Added Slovenian to available language options

Related to #1946

app/Config/app.php

@@ -52,7 +52,7 @@ return [
     'locale' => env('APP_LANG', 'en'),
 
     // Locales available
-    'locales' => ['en', 'ar', 'cs', 'da', 'de', 'de_informal', 'es', 'es_AR', 'fa', 'fr', 'he', 'hu', 'it', 'ja', 'ko', 'nl', 'pt', 'pt_BR', 'sk', 'sv', 'pl',  'ru', 'tr', 'uk', 'vi', 'zh_CN', 'zh_TW',],
+    'locales' => ['en', 'ar', 'cs', 'da', 'de', 'de_informal', 'es', 'es_AR', 'fa', 'fr', 'he', 'hu', 'it', 'ja', 'ko', 'nl', 'pt', 'pt_BR', 'sk', 'sl', 'sv', 'pl',  'ru', 'tr', 'uk', 'vi', 'zh_CN', 'zh_TW',],
 
     //  Application Fallback Locale
     'fallback_locale' => 'en',

app/Http/Middleware/Localization.php

@@ -36,6 +36,7 @@ class Localization
         'pt_BR' => 'pt_BR',
         'ru' => 'ru',
         'sk' => 'sk_SK',
+        'sl' => 'sl_SI',
         'sv' => 'sv_SE',
         'uk' => 'uk_UA',
         'vi' => 'vi_VN',

resources/lang/en/settings.php

@@ -201,6 +201,7 @@ return [
         'pt_BR' => 'Português do Brasil',
         'ru' => 'Русский',
         'sk' => 'Slovensky',
+        'sl' => 'Slovenščina',
         'sv' => 'Svenska',
         'tr' => 'Türkçe',
         'uk' => 'Українська',