diff --git a/composer.json b/composer.json
index 84768af..0a36ed3 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,8 @@
     "symfony/yaml": "^7.0",
     "lunarphp/table-rate-shipping": "^1.3",
     "lunarphp/search": "*",
-    "lunarphp/meilisearch": "*"
+    "lunarphp/meilisearch": "*",
+    "spatie/laravel-translation-loader": "^2.8"
   },
   "require-dev": {
     "fakerphp/faker": "^1.23",
@@ -33,13 +34,15 @@
       "providers": [
         "Modules\\Core\\Providers\\CoreServiceProvider",
         "Modules\\Core\\Providers\\AuthServiceProvider",
-        "Modules\\Core\\Providers\\CustomerServiceProvider"
+        "Modules\\Core\\Providers\\CustomerServiceProvider",
+        "Modules\\Core\\Providers\\LocalizationServiceProvider"
       ]
     }
   },
   "config": {
     "allow-plugins": {
-      "pestphp/pest-plugin": true
+      "pestphp/pest-plugin": true,
+      "php-http/discovery": true
     }
   }
 }
diff --git a/database/migrations/2026_08_05_210535_create_language_lines_table.php b/database/migrations/2026_08_05_210535_create_language_lines_table.php
new file mode 100644
index 0000000..d24d12a
--- /dev/null
+++ b/database/migrations/2026_08_05_210535_create_language_lines_table.php
@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up(): void
+    {
+        Schema::create('language_lines', function (Blueprint $table) {
+            $table->id();
+            $table->string('group')->index();
+            $table->string('key');
+            $table->json('text');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('language_lines');
+    }
+};
diff --git a/docs/localization.md b/docs/localization.md
new file mode 100644
index 0000000..18fe74d
--- /dev/null
+++ b/docs/localization.md
@@ -0,0 +1,215 @@
+# Localization
+
+Storefront routes can be locale-prefixed (`/el/proionta`, `/en/products`) using a middleware
+that reads directly from Lunar's `languages` table — the same table the Filament **Languages**
+resource manages, so there's no separate locale config to keep in sync.
+
+---
+
+## Why prefix every locale, including the default
+
+Leaving the default locale bare at the root (`/proionta` for Greek, `/en/products` for English)
+creates ambiguity: is `/` the language-neutral homepage or specifically the Greek version? It
+also complicates `hreflang` (needs a self-referencing tag on the root plus a possibly-duplicate
+`x-default`) and risks duplicate content if a bot or campaign link reaches the root without a
+language signal.
+
+Prefixing every locale avoids this: every URL unambiguously declares its language, `hreflang`
+tags are symmetrical, and adding a locale later requires no URL restructuring.
+
+---
+
+## Opt-in, not global
+
+The middleware is registered as a **named alias** (`locale`), not pushed onto the `web`
+middleware group. Apply it explicitly to the route group(s) that make up your storefront:
+
+```php
+// routes/web.php
+use Illuminate\Support\Facades\Route;
+
+Route::middleware('locale')->group(function () {
+    Route::get('/{locale}', HomeController::class);
+    Route::get('/{locale}/proionta', ProductIndexController::class);
+    Route::get('/{locale}/proionta/{slug}', ProductShowController::class);
+});
+```
+
+It is **not** applied automatically because storefront routes aren't the only routes living
+under `web` in a shop:
+
+- The Filament admin panel (`/boboko*`, see `PanelServiceProvider`) has its own routing/auth
+  concerns and must never be locale-redirected.
+- Livewire's internal update endpoint (`/livewire/update`) must resolve without a locale prefix.
+- Webhooks, health checks, and other non-storefront routes shouldn't be touched.
+
+If a shop's entire `web.php` *is* the storefront, wrapping the whole file in the group above is
+fine — just keep admin/Livewire/webhook routes registered outside of it (as they already are).
+
+---
+
+## Behavior
+
+`Modules\Core\Localization\LocaleMiddleware`:
+
+1. Reads the first path segment (`request()->segment(1)`).
+2. Matches it against `Lunar\Models\Language::code`.
+   - **Match** — `App::setLocale($code)` is set, and `locale` / `language` request attributes
+     are populated for controllers/views to use.
+   - **No match** (missing, wrong, or unknown segment) — redirects to the same path prefixed
+     with a resolved locale:
+     - the best match from the `Accept-Language` header against available language codes, or
+     - the language flagged `default` in the `languages` table, or
+     - the first language row, as a last resort.
+
+The language list is cached with `Cache::rememberForever()` under `core.localization.languages`
+and invalidated automatically. Adding, editing, or removing a language via the Filament
+**Languages** resource clears the cache immediately — no TTL, no stale reads.
+
+### How invalidation is wired (event-driven, not the observer itself)
+
+`Modules\Core\Localization\LanguageCacheObserver` observes `Lunar\Models\Language`'s
+`created`/`updated`/`deleted` Eloquent events, but it's a thin trigger only — it doesn't do any
+invalidation work itself. It dispatches one of three events from
+`Modules\Core\Localization\Events` (`LanguageCreated`, `LanguageUpdated` — carrying the old
+`code` — or `LanguageDeleted`), and two listeners, wired in
+`Modules\Core\Providers\LocalizationServiceProvider`, react:
+
+- **`FlushLanguageCache`** — flushes `core.localization.languages` on all three events.
+- **`MigrateTranslationsForRenamedLanguage`** — `LanguageUpdated` only, and only when `code`
+  actually changed. A renamed `Language::code` (e.g. `el` → `gr`) would otherwise strand every
+  `LanguageLine`'s translated text under the old, now-unroutable key —
+  `getTranslationsForGroup('gr', ...)` would silently return nothing for that locale even though
+  the translated content still exists. This listener moves the `text.{oldCode}` key to
+  `text.{newCode}` on every affected `LanguageLine` row and flushes both the old and new code's
+  translation cache for every group touched.
+
+Deleting a `Language` only flushes the language-list cache — `LanguageLine.text` keys for the
+deleted code are left in place rather than destructively erased, in case the language is ever
+re-added under the same code.
+
+Splitting cache-flush and text-migration into separate listeners (rather than one
+`LanguageCacheObserver` method doing both) mirrors the same event → listener pattern used for
+`TranslationService`'s writes below — the observer only detects *what happened*, listeners own
+*what to do about it*.
+
+---
+
+## Reading the resolved locale/language downstream
+
+```php
+// In a controller or view composer
+$locale = $request->attributes->get('locale');      // e.g. "el"
+$language = $request->attributes->get('language');   // Lunar\Models\Language instance
+```
+
+Use `$language->id` when querying Lunar's translatable content (e.g. `Url::where('language_id', ...)`).
+
+---
+
+## Single-language shops
+
+If a shop has only one row in `languages`, the middleware still enforces the prefix (e.g. every
+URL under `/en/...`) rather than special-casing it away — this keeps behavior identical across
+shops and avoids a silent restructuring if a second language is added later. If a shop genuinely
+never wants locale prefixes, don't apply the `locale` middleware to its routes at all.
+
+---
+
+## Storefront UI labels (`__('storefront.*')`)
+
+The `locale` middleware resolves *which* language a request is in — routing/redirects,
+`Lunar\Models\Language`, and Lunar's own translatable product/collection content. It has nothing
+to do with static UI chrome like "Cart", "Back", "Add to Cart". Those are handled separately by
+[`spatie/laravel-translation-loader`](https://github.com/spatie/laravel-translation-loader),
+stored in the `language_lines` table.
+
+### Why a separate system, not another `languages`-table lookup
+
+Lunar's translatable fields (`TranslatedText`, `Url`, etc.) are all tied to specific *model
+records* — a product's name, a collection's description. UI labels aren't attached to any model;
+they're static strings the app itself owns. `laravel-translation-loader` is Laravel's own
+`__()`/`trans()` mechanism with a DB-backed source layered on top of the normal file-based one —
+no new helper to learn, no bespoke table shape.
+
+**Nothing existing breaks.** The package's `TranslationLoaderManager` *extends* Laravel's
+`FileLoader` and merges DB translations on top of file-based ones
+(`array_replace_recursive()`) — Filament's own vendor `lang/en/product.php`-style strings
+keep working exactly as before. The package registers itself via Laravel's standard Composer
+package auto-discovery (`extra.laravel.providers` in its own `composer.json`) — nothing needed
+in `CoreServiceProvider` to wire it up.
+
+### Usage
+
+```blade
+{{ __('storefront.nav.cart') }}
+{{ __('storefront.product.add_to_cart') }}
+```
+
+`group` is `storefront` for e-shop UI labels — kept separate from Lunar/Filament's own `lunar::`
+namespaced groups so nothing collides. `__()` resolves the translation for whatever
+`App::getLocale()` currently is, which `LocaleMiddleware` already sets per-request (see
+"Behavior" above) — no extra wiring needed between the two systems.
+
+### Seeding
+
+A starter set of common e-shop labels (`nav.*`, `cart.*`, `product.*`, `auth.*`, `search.*`,
+English + Greek) is seeded by `Modules\Core\Command\InstallLunarCommand` (overrides Lunar's own
+`lunar:install`), guarded by `LanguageLine::where('group', 'storefront')->exists()` — same
+idempotent pattern as the rest of that command, safe to run unattended on every boot.
+
+### Admin UI
+
+`Modules\Core\Localization\Filament\Resources\LanguageLineResource` (registered in
+`CorePlugin`, under the panel's Settings group) lists/searches/filters `language_lines` and
+edits each row's `group`, `key`, and one text input per row currently in `lunar_languages` —
+the locale columns are generated dynamically from `Language::query()->pluck('code')`, so adding
+a third language automatically adds a third input, no resource changes needed.
+
+### `TranslationService` — writes go through here, not the model directly
+
+`Modules\Core\Localization\TranslationService` wraps create/update/delete on `LanguageLine` and
+dispatches a domain event after each write, following this project's standard event-driven
+pattern (see `modules.md`'s "Splitting Service Providers" / event-listener convention —
+the same shape as `Modules\Core\Auth\Events\UserCreated`):
+
+```php
+use Modules\Core\Localization\TranslationService;
+
+app(TranslationService::class)->create('storefront', 'nav.wishlist', [
+    'en' => 'Wishlist',
+    'el' => 'Λίστα Επιθυμιών',
+]);
+
+app(TranslationService::class)->update(
+    $languageLine,
+    'storefront',
+    'nav.wishlist',
+    ['en' => 'Wishlist ♥', 'el' => 'Λίστα Επιθυμιών ♥'],
+);
+
+app(TranslationService::class)->delete($languageLine);
+```
+
+`update()` takes the full `group`/`key`/`text` state, not just `text` — a rename is a normal
+update, not a special case. `TranslationCreated`, `TranslationUpdated` (carries the full
+`{group, key, text}` snapshot from *before* the update, so a listener can tell a rename from a
+text edit), and `TranslationDeleted` are dispatched from `Modules\Core\Localization\Events`. Two
+listeners are wired in `Modules\Core\Providers\LocalizationServiceProvider` for all three events:
+
+- **`FlushTranslationCache`** — `LanguageLine::boot()` already flushes the cache for the
+  *current* group's locales present after a save, but misses two cases on update: locales a save
+  *removed* from `text` (e.g. dropping the `el` key leaves `storefront.el` stale), and a changed
+  `group`/`key` (the *old* group's cached array is never told a row left it). This listener
+  flushes every group+locale combination touched by either the old or new state, so nothing —
+  including the group a row was renamed away from — can remain stale.
+- **`LogTranslationActivity`** — records the change via `Modules\Core\Logging\ActivityLogService`
+  on the `lunar` activity log channel, same `created`/`updated`/`deleted` shape as every other
+  domain write in this project. A rename shows up in the log as an `old`/`attributes` diff across
+  `group`, `key`, and `text` together, not just a text diff.
+
+The Filament resource's Create/Edit/Delete pages route through `TranslationService` (via
+`handleRecordCreation`/`handleRecordUpdate`/the delete action's `->action()` override) rather
+than Filament's default direct-model calls, so **every** edit made in the admin UI — including a
+bare `group`/`key` rename with no `text` change — dispatches `TranslationUpdated` and is both
+cache-invalidated and audit-logged.
diff --git a/src/Command/InstallLunarCommand.php b/src/Command/InstallLunarCommand.php
index f74b925..e07d3a3 100644
--- a/src/Command/InstallLunarCommand.php
+++ b/src/Command/InstallLunarCommand.php
@@ -18,6 +18,7 @@ use Lunar\Models\Product;
 use Lunar\Models\ProductType;
 use Lunar\Models\TaxClass;
 use Lunar\Models\TaxZone;
+use Spatie\TranslationLoader\LanguageLine;
 
 /**
  * Overrides Lunar's own lunar:install to skip the interactive prompts (migrate
@@ -241,9 +242,43 @@ class InstallLunarCommand extends Command
             }
         });
 
+        if (! LanguageLine::where('group', 'storefront')->exists()) {
+            $this->components->info('Seeding storefront label translations');
+            $this->seedStorefrontLabels();
+        }
+
         $this->components->info('Publishing Filament assets');
         $this->call('filament:assets');
 
         $this->components->info('Lunar default data seeded.');
     }
+
+    private function seedStorefrontLabels(): void
+    {
+        $labels = [
+            'nav.home' => ['en' => 'Home', 'el' => 'Αρχική'],
+            'nav.products' => ['en' => 'Products', 'el' => 'Προϊόντα'],
+            'nav.cart' => ['en' => 'Cart', 'el' => 'Καλάθι'],
+            'nav.account' => ['en' => 'Account', 'el' => 'Λογαριασμός'],
+            'nav.back' => ['en' => 'Back', 'el' => 'Πίσω'],
+            'cart.empty' => ['en' => 'Your cart is empty', 'el' => 'Το καλάθι σας είναι άδειο'],
+            'cart.checkout' => ['en' => 'Checkout', 'el' => 'Ολοκλήρωση Παραγγελίας'],
+            'cart.total' => ['en' => 'Total', 'el' => 'Σύνολο'],
+            'cart.remove' => ['en' => 'Remove', 'el' => 'Αφαίρεση'],
+            'product.add_to_cart' => ['en' => 'Add to Cart', 'el' => 'Προσθήκη στο Καλάθι'],
+            'product.out_of_stock' => ['en' => 'Out of Stock', 'el' => 'Εξαντλήθηκε'],
+            'product.price' => ['en' => 'Price', 'el' => 'Τιμή'],
+            'auth.login' => ['en' => 'Log In', 'el' => 'Σύνδεση'],
+            'auth.logout' => ['en' => 'Log Out', 'el' => 'Αποσύνδεση'],
+            'search.placeholder' => ['en' => 'Search products…', 'el' => 'Αναζήτηση προϊόντων…'],
+        ];
+
+        foreach ($labels as $key => $text) {
+            LanguageLine::create([
+                'group' => 'storefront',
+                'key' => $key,
+                'text' => $text,
+            ]);
+        }
+    }
 }
diff --git a/src/CorePlugin.php b/src/CorePlugin.php
index 38a356f..ef0bd4a 100644
--- a/src/CorePlugin.php
+++ b/src/CorePlugin.php
@@ -15,6 +15,7 @@ use Lunar\Shipping\ShippingPlugin;
 use Modules\Core\Auth\Extensions\StaffResourceExtension;
 use Modules\Core\Auth\Filament\Pages\Login;
 use Modules\Core\Auth\Mail\InviteMail;
+use Modules\Core\Localization\Filament\Resources\LanguageLineResource;
 use Modules\Core\Review\Extensions\ProductResourceExtension;
 use Modules\Core\Review\Models\ProductReview;
 
@@ -32,6 +33,9 @@ class CorePlugin implements Plugin
             ->brandLogo(asset('static/logos/core/boboko-logo.svg'))
             ->darkModeBrandLogo(asset('static/logos/core/boboko-logo-white.svg'))
             ->login(Login::class)
+            ->resources([
+                LanguageLineResource::class,
+            ])
             ->plugin(ShippingPlugin::make());
 
         LunarPanel::extensions([
diff --git a/src/Localization/Events/LanguageCreated.php b/src/Localization/Events/LanguageCreated.php
new file mode 100644
index 0000000..d9aabf0
--- /dev/null
+++ b/src/Localization/Events/LanguageCreated.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Modules\Core\Localization\Events;
+
+use Lunar\Models\Language;
+
+class LanguageCreated
+{
+    public function __construct(
+        public readonly Language $language,
+    ) {}
+}
diff --git a/src/Localization/Events/LanguageDeleted.php b/src/Localization/Events/LanguageDeleted.php
new file mode 100644
index 0000000..e8bb75a
--- /dev/null
+++ b/src/Localization/Events/LanguageDeleted.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Modules\Core\Localization\Events;
+
+use Lunar\Models\Language;
+
+class LanguageDeleted
+{
+    public function __construct(
+        public readonly Language $language,
+    ) {}
+}
diff --git a/src/Localization/Events/LanguageUpdated.php b/src/Localization/Events/LanguageUpdated.php
new file mode 100644
index 0000000..584814b
--- /dev/null
+++ b/src/Localization/Events/LanguageUpdated.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Modules\Core\Localization\Events;
+
+use Lunar\Models\Language;
+
+class LanguageUpdated
+{
+    /**
+     * @param  array{code: string}  $old  Snapshot of watched attributes before the update.
+     */
+    public function __construct(
+        public readonly Language $language,
+        public readonly array $old,
+    ) {}
+}
diff --git a/src/Localization/Events/TranslationCreated.php b/src/Localization/Events/TranslationCreated.php
new file mode 100644
index 0000000..b102617
--- /dev/null
+++ b/src/Localization/Events/TranslationCreated.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Modules\Core\Localization\Events;
+
+use Spatie\TranslationLoader\LanguageLine;
+
+class TranslationCreated
+{
+    public function __construct(
+        public readonly LanguageLine $languageLine,
+    ) {}
+}
diff --git a/src/Localization/Events/TranslationDeleted.php b/src/Localization/Events/TranslationDeleted.php
new file mode 100644
index 0000000..0c3bbbf
--- /dev/null
+++ b/src/Localization/Events/TranslationDeleted.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Modules\Core\Localization\Events;
+
+use Spatie\TranslationLoader\LanguageLine;
+
+class TranslationDeleted
+{
+    public function __construct(
+        public readonly LanguageLine $languageLine,
+    ) {}
+}
diff --git a/src/Localization/Events/TranslationUpdated.php b/src/Localization/Events/TranslationUpdated.php
new file mode 100644
index 0000000..84971d9
--- /dev/null
+++ b/src/Localization/Events/TranslationUpdated.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Modules\Core\Localization\Events;
+
+use Spatie\TranslationLoader\LanguageLine;
+
+class TranslationUpdated
+{
+    /**
+     * @param  array{group: string, key: string, text: array}  $old  Snapshot before the update.
+     */
+    public function __construct(
+        public readonly LanguageLine $languageLine,
+        public readonly array $old,
+    ) {}
+}
diff --git a/src/Localization/Filament/Resources/LanguageLineResource.php b/src/Localization/Filament/Resources/LanguageLineResource.php
new file mode 100644
index 0000000..3fe9469
--- /dev/null
+++ b/src/Localization/Filament/Resources/LanguageLineResource.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace Modules\Core\Localization\Filament\Resources;
+
+use Filament\Forms;
+use Filament\Forms\Form;
+use Filament\Resources\Resource;
+use Filament\Tables;
+use Filament\Tables\Table;
+use Lunar\Models\Language;
+use Modules\Core\Localization\Filament\Resources\LanguageLineResource\Pages;
+use Spatie\TranslationLoader\LanguageLine;
+
+class LanguageLineResource extends Resource
+{
+    protected static ?string $model = LanguageLine::class;
+
+    protected static ?string $navigationIcon = 'heroicon-o-language';
+
+    protected static ?string $navigationGroup = 'Settings';
+
+    protected static ?string $modelLabel = 'Translation';
+
+    protected static ?string $pluralModelLabel = 'Translations';
+
+    public static function form(Form $form): Form
+    {
+        return $form->schema([
+            Forms\Components\TextInput::make('group')
+                ->required()
+                ->maxLength(255)
+                ->default('storefront')
+                ->helperText('Namespace for this label, e.g. "storefront" for e-shop UI text.'),
+
+            Forms\Components\TextInput::make('key')
+                ->required()
+                ->maxLength(255)
+                ->helperText('Dot-notation key, e.g. "nav.cart".'),
+
+            Forms\Components\Fieldset::make('Translations')
+                ->schema(static::localeInputs()),
+        ]);
+    }
+
+    public static function table(Table $table): Table
+    {
+        return $table
+            ->columns([
+                Tables\Columns\TextColumn::make('group')
+                    ->badge()
+                    ->sortable(),
+                Tables\Columns\TextColumn::make('key')
+                    ->searchable()
+                    ->sortable(),
+                ...static::localeColumns(),
+            ])
+            ->filters([
+                Tables\Filters\SelectFilter::make('group')
+                    ->options(fn () => LanguageLine::query()->distinct()->pluck('group', 'group')),
+            ])
+            ->defaultSort('key');
+    }
+
+    public static function getRelations(): array
+    {
+        return [];
+    }
+
+    public static function getPages(): array
+    {
+        return [
+            'index' => Pages\ListLanguageLines::route('/'),
+            'create' => Pages\CreateLanguageLine::route('/create'),
+            'edit' => Pages\EditLanguageLine::route('/{record}/edit'),
+        ];
+    }
+
+    /**
+     * @return array<Forms\Components\Textarea>
+     */
+    private static function localeInputs(): array
+    {
+        return static::localeCodes()
+            ->map(fn (string $code) => Forms\Components\Textarea::make("text.{$code}")
+                ->label(strtoupper($code))
+                ->rows(2))
+            ->all();
+    }
+
+    /**
+     * @return array<Tables\Columns\TextColumn>
+     */
+    private static function localeColumns(): array
+    {
+        return static::localeCodes()
+            ->map(fn (string $code) => Tables\Columns\TextColumn::make("text.{$code}")
+                ->label(strtoupper($code))
+                ->limit(40)
+                ->toggleable())
+            ->all();
+    }
+
+    private static function localeCodes(): \Illuminate\Support\Collection
+    {
+        return Language::query()->pluck('code');
+    }
+}
diff --git a/src/Localization/Filament/Resources/LanguageLineResource/Pages/CreateLanguageLine.php b/src/Localization/Filament/Resources/LanguageLineResource/Pages/CreateLanguageLine.php
new file mode 100644
index 0000000..7870fe2
--- /dev/null
+++ b/src/Localization/Filament/Resources/LanguageLineResource/Pages/CreateLanguageLine.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Modules\Core\Localization\Filament\Resources\LanguageLineResource\Pages;
+
+use Filament\Resources\Pages\CreateRecord;
+use Illuminate\Database\Eloquent\Model;
+use Modules\Core\Localization\Filament\Resources\LanguageLineResource;
+use Modules\Core\Localization\TranslationService;
+
+class CreateLanguageLine extends CreateRecord
+{
+    protected static string $resource = LanguageLineResource::class;
+
+    protected function handleRecordCreation(array $data): Model
+    {
+        return app(TranslationService::class)->create(
+            $data['group'],
+            $data['key'],
+            $data['text'] ?? [],
+        );
+    }
+}
diff --git a/src/Localization/Filament/Resources/LanguageLineResource/Pages/EditLanguageLine.php b/src/Localization/Filament/Resources/LanguageLineResource/Pages/EditLanguageLine.php
new file mode 100644
index 0000000..80c864a
--- /dev/null
+++ b/src/Localization/Filament/Resources/LanguageLineResource/Pages/EditLanguageLine.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Modules\Core\Localization\Filament\Resources\LanguageLineResource\Pages;
+
+use Filament\Actions;
+use Filament\Actions\Action;
+use Filament\Resources\Pages\EditRecord;
+use Illuminate\Database\Eloquent\Model;
+use Modules\Core\Localization\Filament\Resources\LanguageLineResource;
+use Modules\Core\Localization\TranslationService;
+use Spatie\TranslationLoader\LanguageLine;
+
+class EditLanguageLine extends EditRecord
+{
+    protected static string $resource = LanguageLineResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            Actions\DeleteAction::make()
+                ->action(function (LanguageLine $record) {
+                    app(TranslationService::class)->delete($record);
+
+                    $this->redirect($this->getResource()::getUrl('index'));
+                }),
+        ];
+    }
+
+    /**
+     * Filament's default Cancel button uses window.history.back(), which
+     * restores the browser's cached previous page instead of re-fetching —
+     * so an edit made just before clicking Cancel doesn't show up in the
+     * list until a manual refresh. Redirect through Livewire instead, which
+     * always re-queries.
+     */
+    protected function getCancelFormAction(): Action
+    {
+        return Action::make('cancel')
+            ->label(__('filament-panels::resources/pages/edit-record.form.actions.cancel.label'))
+            ->url(static::getResource()::getUrl('index'))
+            ->color('gray');
+    }
+
+    protected function handleRecordUpdate(Model $record, array $data): Model
+    {
+        return app(TranslationService::class)->update(
+            $record,
+            $data['group'],
+            $data['key'],
+            $data['text'] ?? [],
+        );
+    }
+}
diff --git a/src/Localization/Filament/Resources/LanguageLineResource/Pages/ListLanguageLines.php b/src/Localization/Filament/Resources/LanguageLineResource/Pages/ListLanguageLines.php
new file mode 100644
index 0000000..12c7b37
--- /dev/null
+++ b/src/Localization/Filament/Resources/LanguageLineResource/Pages/ListLanguageLines.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace Modules\Core\Localization\Filament\Resources\LanguageLineResource\Pages;
+
+use Filament\Actions;
+use Filament\Resources\Pages\ListRecords;
+use Modules\Core\Localization\Filament\Resources\LanguageLineResource;
+
+class ListLanguageLines extends ListRecords
+{
+    protected static string $resource = LanguageLineResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            Actions\CreateAction::make(),
+        ];
+    }
+}
diff --git a/src/Localization/LanguageCacheObserver.php b/src/Localization/LanguageCacheObserver.php
new file mode 100644
index 0000000..774ce41
--- /dev/null
+++ b/src/Localization/LanguageCacheObserver.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Modules\Core\Localization;
+
+use Illuminate\Support\Facades\Event;
+use Lunar\Models\Language;
+use Modules\Core\Localization\Events\LanguageCreated;
+use Modules\Core\Localization\Events\LanguageDeleted;
+use Modules\Core\Localization\Events\LanguageUpdated;
+
+class LanguageCacheObserver
+{
+    public function created(Language $language): void
+    {
+        Event::dispatch(new LanguageCreated($language));
+    }
+
+    public function updated(Language $language): void
+    {
+        Event::dispatch(new LanguageUpdated($language, [
+            'code' => $language->getOriginal('code'),
+        ]));
+    }
+
+    public function deleted(Language $language): void
+    {
+        Event::dispatch(new LanguageDeleted($language));
+    }
+}
diff --git a/src/Localization/Listeners/FlushLanguageCache.php b/src/Localization/Listeners/FlushLanguageCache.php
new file mode 100644
index 0000000..575811c
--- /dev/null
+++ b/src/Localization/Listeners/FlushLanguageCache.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Modules\Core\Localization\Listeners;
+
+use Modules\Core\Localization\Events\LanguageCreated;
+use Modules\Core\Localization\Events\LanguageDeleted;
+use Modules\Core\Localization\Events\LanguageUpdated;
+use Modules\Core\Localization\LocaleMiddleware;
+
+class FlushLanguageCache
+{
+    public function handle(LanguageCreated|LanguageUpdated|LanguageDeleted $event): void
+    {
+        LocaleMiddleware::forgetLanguagesCache();
+    }
+}
diff --git a/src/Localization/Listeners/FlushTranslationCache.php b/src/Localization/Listeners/FlushTranslationCache.php
new file mode 100644
index 0000000..4b9d6ca
--- /dev/null
+++ b/src/Localization/Listeners/FlushTranslationCache.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Modules\Core\Localization\Listeners;
+
+use Illuminate\Support\Facades\Cache;
+use Modules\Core\Localization\Events\TranslationCreated;
+use Modules\Core\Localization\Events\TranslationDeleted;
+use Modules\Core\Localization\Events\TranslationUpdated;
+use Spatie\TranslationLoader\LanguageLine;
+
+/**
+ * LanguageLine::boot() already flushes the cache for the current group's locales
+ * present after a save, but misses two cases on update: locales removed from
+ * `text` (e.g. dropping the "el" key leaves `{group}.el` stale), and a changed
+ * `group`/`key` (the old group's cached array never gets told a row left it).
+ * This listener flushes every group+locale combination touched by either the
+ * old or new state so nothing can remain stale.
+ */
+class FlushTranslationCache
+{
+    public function handle(TranslationCreated|TranslationUpdated|TranslationDeleted $event): void
+    {
+        $this->flush($event->languageLine->group, array_keys($event->languageLine->text ?? []));
+
+        if ($event instanceof TranslationUpdated) {
+            $this->flush($event->old['group'], array_keys($event->old['text'] ?? []));
+        }
+    }
+
+    private function flush(string $group, array $locales): void
+    {
+        foreach ($locales as $locale) {
+            Cache::forget(LanguageLine::getCacheKey($group, $locale));
+        }
+    }
+}
diff --git a/src/Localization/Listeners/LogTranslationActivity.php b/src/Localization/Listeners/LogTranslationActivity.php
new file mode 100644
index 0000000..3a83b7b
--- /dev/null
+++ b/src/Localization/Listeners/LogTranslationActivity.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Modules\Core\Localization\Listeners;
+
+use Illuminate\Support\Arr;
+use Modules\Core\Localization\Events\TranslationCreated;
+use Modules\Core\Localization\Events\TranslationDeleted;
+use Modules\Core\Localization\Events\TranslationUpdated;
+use Modules\Core\Logging\ActivityLogService;
+use Spatie\TranslationLoader\LanguageLine;
+
+class LogTranslationActivity
+{
+    public function __construct(
+        private readonly ActivityLogService $activityLog,
+    ) {}
+
+    public function handle(TranslationCreated|TranslationUpdated|TranslationDeleted $event): void
+    {
+        $languageLine = $event->languageLine;
+
+        match (true) {
+            $event instanceof TranslationCreated => $this->activityLog->created(
+                $languageLine,
+                $this->flatten($languageLine),
+            ),
+            $event instanceof TranslationUpdated => $this->activityLog->updated(
+                $languageLine,
+                Arr::dot($event->old),
+                $this->flatten($languageLine),
+            ),
+            $event instanceof TranslationDeleted => $this->activityLog->deleted(
+                $languageLine,
+                $this->flatten($languageLine),
+            ),
+        };
+    }
+
+    /**
+     * Filament's Activity resource renders `properties` with a flat KeyValue
+     * field, which can't display a nested value like `text: {en, el}` — it
+     * shows as "[object Object]". Flatten to dot-notation ("text.en",
+     * "text.el") so every property is a plain string, viewable as-is.
+     */
+    private function flatten(LanguageLine $languageLine): array
+    {
+        return Arr::dot([
+            'group' => $languageLine->group,
+            'key' => $languageLine->key,
+            'text' => $languageLine->text,
+        ]);
+    }
+}
diff --git a/src/Localization/Listeners/MigrateTranslationsForRenamedLanguage.php b/src/Localization/Listeners/MigrateTranslationsForRenamedLanguage.php
new file mode 100644
index 0000000..046fd23
--- /dev/null
+++ b/src/Localization/Listeners/MigrateTranslationsForRenamedLanguage.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace Modules\Core\Localization\Listeners;
+
+use Illuminate\Support\Facades\Cache;
+use Modules\Core\Localization\Events\LanguageUpdated;
+use Spatie\TranslationLoader\LanguageLine;
+
+/**
+ * A renamed Language::code (e.g. "el" -> "gr") would otherwise strand every
+ * LanguageLine's translated text under the old, now-unroutable key —
+ * getTranslationsForGroup($newCode, ...) would silently return nothing for
+ * that locale even though the translated content still exists. Move the
+ * text.{oldCode} key to text.{newCode} on every affected row instead.
+ */
+class MigrateTranslationsForRenamedLanguage
+{
+    public function handle(LanguageUpdated $event): void
+    {
+        $oldCode = $event->old['code'];
+        $newCode = $event->language->code;
+
+        if ($oldCode === $newCode) {
+            return;
+        }
+
+        $affectedGroups = [];
+
+        LanguageLine::query()
+            ->whereJsonContainsKey('text->'.$oldCode)
+            ->each(function (LanguageLine $languageLine) use ($oldCode, $newCode, &$affectedGroups) {
+                $text = $languageLine->text;
+                $text[$newCode] = $text[$oldCode];
+                unset($text[$oldCode]);
+
+                $languageLine->update(['text' => $text]);
+
+                $affectedGroups[$languageLine->group] = true;
+            });
+
+        foreach (array_keys($affectedGroups) as $group) {
+            Cache::forget(LanguageLine::getCacheKey($group, $oldCode));
+            Cache::forget(LanguageLine::getCacheKey($group, $newCode));
+        }
+    }
+}
diff --git a/src/Localization/LocaleMiddleware.php b/src/Localization/LocaleMiddleware.php
new file mode 100644
index 0000000..f3e4918
--- /dev/null
+++ b/src/Localization/LocaleMiddleware.php
@@ -0,0 +1,78 @@
+<?php
+
+namespace Modules\Core\Localization;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\App;
+use Illuminate\Support\Facades\Cache;
+use Lunar\Models\Language;
+use Symfony\Component\HttpFoundation\Response;
+
+class LocaleMiddleware
+{
+    private const CACHE_KEY = 'core.localization.languages';
+
+    public function handle(Request $request, Closure $next): Response
+    {
+        $languages = $this->availableLanguages();
+
+        if ($languages->isEmpty()) {
+            return $next($request);
+        }
+
+        $segment = (string) $request->segment(1);
+        $language = $languages->firstWhere('code', $segment);
+
+        if (! $language) {
+            return $this->redirectToLocalizedUrl($request, $languages);
+        }
+
+        App::setLocale($language->code);
+        $request->attributes->set('locale', $language->code);
+        $request->attributes->set('language', $language);
+
+        return $next($request);
+    }
+
+    public static function forgetLanguagesCache(): void
+    {
+        Cache::forget(self::CACHE_KEY);
+    }
+
+    private function redirectToLocalizedUrl(Request $request, Collection $languages): Response
+    {
+        $locale = $this->negotiateLocale($request, $languages);
+
+        $path = trim($request->getPathInfo(), '/');
+        $target = '/'.$locale.($path !== '' ? '/'.$path : '');
+
+        $query = $request->getQueryString();
+        if ($query) {
+            $target .= '?'.$query;
+        }
+
+        return redirect($target);
+    }
+
+    private function negotiateLocale(Request $request, Collection $languages): string
+    {
+        $preferred = $request->getPreferredLanguage($languages->pluck('code')->all());
+
+        if ($preferred) {
+            return $preferred;
+        }
+
+        return $languages->firstWhere('default', true)?->code
+            ?? $languages->first()->code;
+    }
+
+    private function availableLanguages(): Collection
+    {
+        return Cache::rememberForever(
+            self::CACHE_KEY,
+            fn () => Language::query()->get(['id', 'code', 'name', 'default']),
+        );
+    }
+}
diff --git a/src/Localization/TranslationReader.php b/src/Localization/TranslationReader.php
new file mode 100644
index 0000000..4f57c70
--- /dev/null
+++ b/src/Localization/TranslationReader.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Modules\Core\Localization;
+
+use Illuminate\Support\Facades\App;
+use Spatie\TranslationLoader\LanguageLine;
+
+class TranslationReader
+{
+    private const DEFAULT_GROUP = 'storefront';
+
+    /**
+     * All labels in a group for the given (or current) locale, keyed by their
+     * dot-notation key — e.g. ['nav.cart' => 'Cart', 'nav.home' => 'Home'].
+     * Backed by LanguageLine's own forever-cache, so this is a cache hit after
+     * the first call for a given group+locale.
+     */
+    public function group(string $group = self::DEFAULT_GROUP, ?string $locale = null): array
+    {
+        return LanguageLine::getTranslationsForGroup($locale ?? App::getLocale(), $group);
+    }
+}
diff --git a/src/Localization/TranslationService.php b/src/Localization/TranslationService.php
new file mode 100644
index 0000000..b6bf271
--- /dev/null
+++ b/src/Localization/TranslationService.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace Modules\Core\Localization;
+
+use Illuminate\Support\Facades\Event;
+use Modules\Core\Localization\Events\TranslationCreated;
+use Modules\Core\Localization\Events\TranslationDeleted;
+use Modules\Core\Localization\Events\TranslationUpdated;
+use Spatie\TranslationLoader\LanguageLine;
+
+class TranslationService
+{
+    public function create(string $group, string $key, array $text): LanguageLine
+    {
+        $languageLine = LanguageLine::create([
+            'group' => $group,
+            'key' => $key,
+            'text' => $text,
+        ]);
+
+        Event::dispatch(new TranslationCreated($languageLine));
+
+        return $languageLine;
+    }
+
+    public function update(LanguageLine $languageLine, string $group, string $key, array $text): LanguageLine
+    {
+        // Callers (e.g. Filament's EditRecord) may hand us a model instance
+        // already filled with the new form values in memory — refresh from the
+        // database first so $old reflects what's actually persisted, not what's
+        // about to be written.
+        $persisted = $languageLine->fresh();
+
+        $old = [
+            'group' => $persisted->group,
+            'key' => $persisted->key,
+            'text' => $persisted->text,
+        ];
+
+        $languageLine->update([
+            'group' => $group,
+            'key' => $key,
+            'text' => $text,
+        ]);
+
+        Event::dispatch(new TranslationUpdated($languageLine, $old));
+
+        return $languageLine;
+    }
+
+    public function delete(LanguageLine $languageLine): void
+    {
+        $languageLine->delete();
+
+        Event::dispatch(new TranslationDeleted($languageLine));
+    }
+}
diff --git a/src/Providers/LocalizationServiceProvider.php b/src/Providers/LocalizationServiceProvider.php
new file mode 100644
index 0000000..d2392eb
--- /dev/null
+++ b/src/Providers/LocalizationServiceProvider.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Modules\Core\Providers;
+
+use Illuminate\Support\Facades\Event;
+use Illuminate\Support\ServiceProvider;
+use Lunar\Models\Language;
+use Modules\Core\Localization\Events\LanguageCreated;
+use Modules\Core\Localization\Events\LanguageDeleted;
+use Modules\Core\Localization\Events\LanguageUpdated;
+use Modules\Core\Localization\Events\TranslationCreated;
+use Modules\Core\Localization\Events\TranslationDeleted;
+use Modules\Core\Localization\Events\TranslationUpdated;
+use Modules\Core\Localization\LanguageCacheObserver;
+use Modules\Core\Localization\Listeners\FlushLanguageCache;
+use Modules\Core\Localization\Listeners\FlushTranslationCache;
+use Modules\Core\Localization\Listeners\LogTranslationActivity;
+use Modules\Core\Localization\Listeners\MigrateTranslationsForRenamedLanguage;
+use Modules\Core\Localization\LocaleMiddleware;
+
+class LocalizationServiceProvider extends ServiceProvider
+{
+    public function boot(): void
+    {
+        $this->app['router']->aliasMiddleware('locale', LocaleMiddleware::class);
+        Language::observe(LanguageCacheObserver::class);
+
+        foreach ([TranslationCreated::class, TranslationUpdated::class, TranslationDeleted::class] as $event) {
+            Event::listen($event, FlushTranslationCache::class);
+            Event::listen($event, LogTranslationActivity::class);
+        }
+
+        foreach ([LanguageCreated::class, LanguageUpdated::class, LanguageDeleted::class] as $event) {
+            Event::listen($event, FlushLanguageCache::class);
+        }
+
+        Event::listen(LanguageUpdated::class, MigrateTranslationsForRenamedLanguage::class);
+    }
+}