🌐 **Add and enhance localizations for multiple languages**

- ➕ Added and synced new translations across `pt`, `nl`, `de`, and `lv` language files.
- 🛠️ Fixed missing and duplicate strings in multilingual JSON files.
- ✅ Standardized formatting and indentation of `validation.php` (Latvian).

lang/lv/pagination.php

@@ -3,6 +3,6 @@
 declare(strict_types=1);
 
 return [
-    'next' => 'Nākamais »',
+    'next'     => 'Nākamais »',
     'previous' => '« Iepriekšējais',
 ];