diff --git a/app/Access/Notifications/UserInviteNotification.php b/app/Access/Notifications/UserInviteNotification.php
index b453fc95d..dacce574f 100644
--- a/app/Access/Notifications/UserInviteNotification.php
+++ b/app/Access/Notifications/UserInviteNotification.php
@@ -16,12 +16,12 @@ class UserInviteNotification extends MailNotification
     public function toMail(User $notifiable): MailMessage
     {
         $appName = ['appName' => setting('app-name')];
-        $language = $notifiable->getLanguage();
+        $locale = $notifiable->getLocale();
 
-        return $this->newMailMessage($language)
-                ->subject(trans('auth.user_invite_email_subject', $appName, $language))
-                ->greeting(trans('auth.user_invite_email_greeting', $appName, $language))
-                ->line(trans('auth.user_invite_email_text', [], $language))
-                ->action(trans('auth.user_invite_email_action', [], $language), url('/register/invite/' . $this->token));
+        return $this->newMailMessage($locale)
+                ->subject($locale->trans('auth.user_invite_email_subject', $appName))
+                ->greeting($locale->trans('auth.user_invite_email_greeting', $appName))
+                ->line($locale->trans('auth.user_invite_email_text'))
+                ->action($locale->trans('auth.user_invite_email_action'), url('/register/invite/' . $this->token));
     }
 }
diff --git a/app/Activity/Notifications/Messages/BaseActivityNotification.php b/app/Activity/Notifications/Messages/BaseActivityNotification.php
index 414859091..322df5d94 100644
--- a/app/Activity/Notifications/Messages/BaseActivityNotification.php
+++ b/app/Activity/Notifications/Messages/BaseActivityNotification.php
@@ -5,6 +5,7 @@ namespace BookStack\Activity\Notifications\Messages;
 use BookStack\Activity\Models\Loggable;
 use BookStack\Activity\Notifications\MessageParts\LinkedMailMessageLine;
 use BookStack\App\MailNotification;
+use BookStack\Translation\LocaleDefinition;
 use BookStack\Users\Models\User;
 use Illuminate\Bus\Queueable;
 
@@ -35,12 +36,12 @@ abstract class BaseActivityNotification extends MailNotification
     /**
      * Build the common reason footer line used in mail messages.
      */
-    protected function buildReasonFooterLine(string $language): LinkedMailMessageLine
+    protected function buildReasonFooterLine(LocaleDefinition $locale): LinkedMailMessageLine
     {
         return new LinkedMailMessageLine(
             url('/preferences/notifications'),
-            trans('notifications.footer_reason', [], $language),
-            trans('notifications.footer_reason_link', [], $language),
+            $locale->trans('notifications.footer_reason'),
+            $locale->trans('notifications.footer_reason_link'),
         );
     }
 }
diff --git a/app/Activity/Notifications/Messages/CommentCreationNotification.php b/app/Activity/Notifications/Messages/CommentCreationNotification.php
index 5db61b04b..094ab30b7 100644
--- a/app/Activity/Notifications/Messages/CommentCreationNotification.php
+++ b/app/Activity/Notifications/Messages/CommentCreationNotification.php
@@ -17,17 +17,17 @@ class CommentCreationNotification extends BaseActivityNotification
         /** @var Page $page */
         $page = $comment->entity;
 
-        $language = $notifiable->getLanguage();
+        $locale = $notifiable->getLocale();
 
-        return $this->newMailMessage($language)
-            ->subject(trans('notifications.new_comment_subject', ['pageName' => $page->getShortName()], $language))
-            ->line(trans('notifications.new_comment_intro', ['appName' => setting('app-name')], $language))
+        return $this->newMailMessage($locale)
+            ->subject($locale->trans('notifications.new_comment_subject', ['pageName' => $page->getShortName()]))
+            ->line($locale->trans('notifications.new_comment_intro', ['appName' => setting('app-name')]))
             ->line(new ListMessageLine([
-                trans('notifications.detail_page_name', [], $language) => $page->name,
-                trans('notifications.detail_commenter', [], $language) => $this->user->name,
-                trans('notifications.detail_comment', [], $language) => strip_tags($comment->html),
+                $locale->trans('notifications.detail_page_name') => $page->name,
+                $locale->trans('notifications.detail_commenter') => $this->user->name,
+                $locale->trans('notifications.detail_comment') => strip_tags($comment->html),
             ]))
-            ->action(trans('notifications.action_view_comment', [], $language), $page->getUrl('#comment' . $comment->local_id))
-            ->line($this->buildReasonFooterLine($language));
+            ->action($locale->trans('notifications.action_view_comment'), $page->getUrl('#comment' . $comment->local_id))
+            ->line($this->buildReasonFooterLine($locale));
     }
 }
diff --git a/app/Activity/Notifications/Messages/PageCreationNotification.php b/app/Activity/Notifications/Messages/PageCreationNotification.php
index 110829469..da028aa8c 100644
--- a/app/Activity/Notifications/Messages/PageCreationNotification.php
+++ b/app/Activity/Notifications/Messages/PageCreationNotification.php
@@ -14,16 +14,16 @@ class PageCreationNotification extends BaseActivityNotification
         /** @var Page $page */
         $page = $this->detail;
 
-        $language = $notifiable->getLanguage();
+        $locale = $notifiable->getLocale();
 
-        return $this->newMailMessage($language)
-            ->subject(trans('notifications.new_page_subject', ['pageName' => $page->getShortName()], $language))
-            ->line(trans('notifications.new_page_intro', ['appName' => setting('app-name')], $language))
+        return $this->newMailMessage($locale)
+            ->subject($locale->trans('notifications.new_page_subject', ['pageName' => $page->getShortName()]))
+            ->line($locale->trans('notifications.new_page_intro', ['appName' => setting('app-name')], $locale))
             ->line(new ListMessageLine([
-                trans('notifications.detail_page_name', [], $language) => $page->name,
-                trans('notifications.detail_created_by', [], $language) => $this->user->name,
+                $locale->trans('notifications.detail_page_name') => $page->name,
+                $locale->trans('notifications.detail_created_by') => $this->user->name,
             ]))
-            ->action(trans('notifications.action_view_page', [], $language), $page->getUrl())
-            ->line($this->buildReasonFooterLine($language));
+            ->action($locale->trans('notifications.action_view_page'), $page->getUrl())
+            ->line($this->buildReasonFooterLine($locale));
     }
 }
diff --git a/app/Activity/Notifications/Messages/PageUpdateNotification.php b/app/Activity/Notifications/Messages/PageUpdateNotification.php
index 8e2d27fa4..1c8155d29 100644
--- a/app/Activity/Notifications/Messages/PageUpdateNotification.php
+++ b/app/Activity/Notifications/Messages/PageUpdateNotification.php
@@ -14,17 +14,17 @@ class PageUpdateNotification extends BaseActivityNotification
         /** @var Page $page */
         $page = $this->detail;
 
-        $language = $notifiable->getLanguage();
+        $locale = $notifiable->getLocale();
 
-        return $this->newMailMessage($language)
-            ->subject(trans('notifications.updated_page_subject', ['pageName' => $page->getShortName()], $language))
-            ->line(trans('notifications.updated_page_intro', ['appName' => setting('app-name')], $language))
+        return $this->newMailMessage($locale)
+            ->subject($locale->trans('notifications.updated_page_subject', ['pageName' => $page->getShortName()]))
+            ->line($locale->trans('notifications.updated_page_intro', ['appName' => setting('app-name')]))
             ->line(new ListMessageLine([
-                trans('notifications.detail_page_name', [], $language) => $page->name,
-                trans('notifications.detail_updated_by', [], $language) => $this->user->name,
+                $locale->trans('notifications.detail_page_name') => $page->name,
+                $locale->trans('notifications.detail_updated_by') => $this->user->name,
             ]))
-            ->line(trans('notifications.updated_page_debounce', [], $language))
-            ->action(trans('notifications.action_view_page', [], $language), $page->getUrl())
-            ->line($this->buildReasonFooterLine($language));
+            ->line($locale->trans('notifications.updated_page_debounce'))
+            ->action($locale->trans('notifications.action_view_page'), $page->getUrl())
+            ->line($this->buildReasonFooterLine($locale));
     }
 }
diff --git a/app/App/MailNotification.php b/app/App/MailNotification.php
index 8c57b5621..50b7f69a7 100644
--- a/app/App/MailNotification.php
+++ b/app/App/MailNotification.php
@@ -2,6 +2,7 @@
 
 namespace BookStack\App;
 
+use BookStack\Translation\LocaleDefinition;
 use BookStack\Users\Models\User;
 use Illuminate\Bus\Queueable;
 use Illuminate\Contracts\Queue\ShouldQueue;
@@ -32,9 +33,9 @@ abstract class MailNotification extends Notification implements ShouldQueue
     /**
      * Create a new mail message.
      */
-    protected function newMailMessage(string $language = ''): MailMessage
+    protected function newMailMessage(?LocaleDefinition $locale = null): MailMessage
     {
-        $data = ['language' => $language ?: null];
+        $data = ['locale' => $locale ?? user()->getLocale()];
 
         return (new MailMessage())->view([
             'html' => 'vendor.notifications.email',
diff --git a/app/Translation/LocaleDefinition.php b/app/Translation/LocaleDefinition.php
index fe8640109..85d36afa0 100644
--- a/app/Translation/LocaleDefinition.php
+++ b/app/Translation/LocaleDefinition.php
@@ -42,4 +42,12 @@ class LocaleDefinition
     {
         return $this->isRtl ? 'rtl' : 'ltr';
     }
+
+    /**
+     * Translate using this locate.
+     */
+    public function trans(string $key, array $replace = []): string
+    {
+        return trans($key, $replace, $this->appLocale());
+    }
 }
diff --git a/app/Translation/LocaleManager.php b/app/Translation/LocaleManager.php
index 171555293..cf93aff06 100644
--- a/app/Translation/LocaleManager.php
+++ b/app/Translation/LocaleManager.php
@@ -27,6 +27,7 @@ class LocaleManager
         'bs'          => ['iso' => 'bs_BA', 'windows' => 'Bosnian (Latin)'],
         'ca'          => ['iso' => 'ca', 'windows' => 'Catalan'],
         'cs'          => ['iso' => 'cs_CZ', 'windows' => 'Czech'],
+        'cy'          => ['iso' => 'cy_GB', 'windows' => 'Welsh'],
         'da'          => ['iso' => 'da_DK', 'windows' => 'Danish'],
         'de'          => ['iso' => 'de_DE', 'windows' => 'German'],
         'de_informal' => ['iso' => 'de_DE', 'windows' => 'German'],
@@ -44,6 +45,7 @@ class LocaleManager
         'id'          => ['iso' => 'id_ID', 'windows' => 'Indonesian'],
         'it'          => ['iso' => 'it_IT', 'windows' => 'Italian'],
         'ja'          => ['iso' => 'ja', 'windows' => 'Japanese'],
+        'ka'          => ['iso' => 'ka_GE', 'windows' => 'Georgian'],
         'ko'          => ['iso' => 'ko_KR', 'windows' => 'Korean'],
         'lt'          => ['iso' => 'lt_LT', 'windows' => 'Lithuanian'],
         'lv'          => ['iso' => 'lv_LV', 'windows' => 'Latvian'],
@@ -99,7 +101,7 @@ class LocaleManager
      */
     protected function autoDetectLocale(Request $request, string $default): string
     {
-        $availableLocales = array_keys($this->localeMap);
+        $availableLocales = $this->getAllAppLocales();
 
         foreach ($request->getLanguages() as $lang) {
             if (in_array($lang, $availableLocales)) {
@@ -151,4 +153,12 @@ class LocaleManager
             setlocale(LC_TIME, $locales[0], ...array_slice($locales, 1));
         }
     }
+
+    /**
+     * Get all the available app-specific level locale strings.
+     */
+    public function getAllAppLocales(): array
+    {
+        return array_keys($this->localeMap);
+    }
 }
diff --git a/app/Users/Models/User.php b/app/Users/Models/User.php
index 78411e0d4..39236c7e4 100644
--- a/app/Users/Models/User.php
+++ b/app/Users/Models/User.php
@@ -12,6 +12,7 @@ use BookStack\Api\ApiToken;
 use BookStack\App\Model;
 use BookStack\App\Sluggable;
 use BookStack\Entities\Tools\SlugGenerator;
+use BookStack\Translation\LocaleDefinition;
 use BookStack\Translation\LocaleManager;
 use BookStack\Uploads\Image;
 use Carbon\Carbon;
@@ -342,11 +343,11 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     }
 
     /**
-     * Get the system language for this user.
+     * Get the locale for this user.
      */
-    public function getLanguage(): string
+    public function getLocale(): LocaleDefinition
     {
-        return app()->make(LocaleManager::class)->getForUser($this)->appLocale();
+        return app()->make(LocaleManager::class)->getForUser($this);
     }
 
     /**
diff --git a/resources/views/layouts/base.blade.php b/resources/views/layouts/base.blade.php
index 0fd12b70f..ca8570d36 100644
--- a/resources/views/layouts/base.blade.php
+++ b/resources/views/layouts/base.blade.php
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
-<html lang="{{ $locale->htmlLang() }}"
-      dir="{{ $locale->htmlDirection() }}"
+<html lang="{{ $locale?->htmlLang() ?? config('app.default_locale') }}"
+      dir="{{ $locale?->htmlDirection() ?? 'auto' }}"
       class="{{ setting()->getForCurrentUser('dark-mode-enabled') ? 'dark-mode ' : '' }}">
 <head>
     <title>{{ isset($pageTitle) ? $pageTitle . ' | ' : '' }}{{ setting('app-name') }}</title>
diff --git a/resources/views/layouts/export.blade.php b/resources/views/layouts/export.blade.php
index eb2397a75..c2c3880e4 100644
--- a/resources/views/layouts/export.blade.php
+++ b/resources/views/layouts/export.blade.php
@@ -1,5 +1,5 @@
 <!doctype html>
-<html lang="{{ $locale->htmlLang() }}">
+<html lang="{{ $locale?->htmlLang() ?? config('app.default_locale') }}">
 <head>
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
     <title>@yield('title')</title>
diff --git a/resources/views/layouts/plain.blade.php b/resources/views/layouts/plain.blade.php
index 360c404c1..7ce9078e2 100644
--- a/resources/views/layouts/plain.blade.php
+++ b/resources/views/layouts/plain.blade.php
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
-<html lang="{{ $locale->htmlLang() }}"
-      dir="{{ $locale->htmlDirection() }}"
+<html lang="{{ $locale?->htmlLang() ?? config('app.default_locale') }}"
+      dir="{{ $locale?->htmlDirection() ?? 'auto' }}"
       class="@yield('document-class')">
 <head>
     <title>{{ isset($pageTitle) ? $pageTitle . ' | ' : '' }}{{ setting('app-name') }}</title>
diff --git a/resources/views/users/create.blade.php b/resources/views/users/create.blade.php
index 0edae1d82..dafc623e1 100644
--- a/resources/views/users/create.blade.php
+++ b/resources/views/users/create.blade.php
@@ -14,7 +14,7 @@
 
                 <div class="setting-list">
                     @include('users.parts.form')
-                    @include('users.parts.language-option-row', ['value' => old('setting.language') ?? config('app.locale')])
+                    @include('users.parts.language-option-row', ['value' => old('language') ?? config('app.default_locale')])
                 </div>
 
                 <div class="form-group text-right">
diff --git a/resources/views/users/edit.blade.php b/resources/views/users/edit.blade.php
index 23cf87684..832186930 100644
--- a/resources/views/users/edit.blade.php
+++ b/resources/views/users/edit.blade.php
@@ -16,7 +16,8 @@
 
                     <div class="grid half gap-xl">
                         <div>
-                            <label for="user-avatar" class="setting-list-label">{{ trans('settings.users_avatar') }}</label>
+                            <label for="user-avatar"
+                                   class="setting-list-label">{{ trans('settings.users_avatar') }}</label>
                             <p class="small">{{ trans('settings.users_avatar_desc') }}</p>
                         </div>
                         <div>
@@ -33,13 +34,15 @@
                         </div>
                     </div>
 
-                    @include('users.parts.language-option-row', ['value' => $user->getLanguage())])
+                    @include('users.parts.language-option-row', ['value' => old('language') ?? $user->getLocale()->appLocale()])
                 </div>
 
                 <div class="text-right">
-                    <a href="{{  url(userCan('users-manage') ? "/settings/users" : "/") }}" class="button outline">{{ trans('common.cancel') }}</a>
+                    <a href="{{  url(userCan('users-manage') ? "/settings/users" : "/") }}"
+                       class="button outline">{{ trans('common.cancel') }}</a>
                     @if($authMethod !== 'system')
-                        <a href="{{ url("/settings/users/{$user->id}/delete") }}" class="button outline">{{ trans('settings.users_delete') }}</a>
+                        <a href="{{ url("/settings/users/{$user->id}/delete") }}"
+                           class="button outline">{{ trans('settings.users_delete') }}</a>
                     @endif
                     <button class="button" type="submit">{{ trans('common.save') }}</button>
                 </div>
@@ -60,7 +63,8 @@
                 </div>
                 <div class="text-m-right">
                     @if($user->id === user()->id)
-                        <a href="{{ url('/mfa/setup')  }}" class="button outline">{{ trans('settings.users_mfa_configure') }}</a>
+                        <a href="{{ url('/mfa/setup')  }}"
+                           class="button outline">{{ trans('settings.users_mfa_configure') }}</a>
                     @endif
                 </div>
             </div>
@@ -84,7 +88,8 @@
                                                     class="button small outline">{{ trans('settings.users_social_disconnect') }}</button>
                                         </form>
                                     @else
-                                        <a href="{{ url("/login/service/{$driver}") }}" aria-label="{{ trans('settings.users_social_connect') }} - {{ $driver }}"
+                                        <a href="{{ url("/login/service/{$driver}") }}"
+                                           aria-label="{{ trans('settings.users_social_connect') }} - {{ $driver }}"
                                            class="button small outline">{{ trans('settings.users_social_connect') }}</a>
                                     @endif
                                 </div>
diff --git a/resources/views/vendor/notifications/email.blade.php b/resources/views/vendor/notifications/email.blade.php
index 1b81c6fc6..8e922fba5 100644
--- a/resources/views/vendor/notifications/email.blade.php
+++ b/resources/views/vendor/notifications/email.blade.php
@@ -159,7 +159,7 @@ $style = [
                                                             <tr>
                                                                 <td style="{{ $fontFamily }}">
                                                                     <p style="{{ $style['paragraph-sub'] }}">
-                                                                        {{ trans('common.email_action_help', ['actionText' => $actionText], $language) }}
+                                                                        {{ $locale->trans('common.email_action_help', ['actionText' => $actionText]) }}
                                                                     </p>
 
                                                                     <p style="{{ $style['paragraph-sub'] }}">
@@ -187,7 +187,7 @@ $style = [
                                                     <p style="{{ $style['paragraph-sub'] }}">
                                                         &copy; {{ date('Y') }}
                                                         <a style="{{ $style['anchor'] }}" href="{{ url('/') }}" target="_blank">{{ setting('app-name') }}</a>.
-                                                        {{ trans('common.email_rights', [], $language) }}
+                                                        {{ $locale->trans('common.email_rights') }}
                                                     </p>
                                                 </td>
                                             </tr>
diff --git a/tests/LanguageTest.php b/tests/LanguageTest.php
index b6a7d1e87..6b6856184 100644
--- a/tests/LanguageTest.php
+++ b/tests/LanguageTest.php
@@ -3,6 +3,7 @@
 namespace Tests;
 
 use BookStack\Activity\ActivityType;
+use BookStack\Translation\LocaleManager;
 
 class LanguageTest extends TestCase
 {
@@ -17,12 +18,12 @@ class LanguageTest extends TestCase
         $this->langs = array_diff(scandir(lang_path('')), ['..', '.']);
     }
 
-    public function test_locales_config_key_set_properly()
+    public function test_locales_list_set_properly()
     {
-        $configLocales = config('app.locales');
-        sort($configLocales);
+        $appLocales = $this->app->make(LocaleManager::class)->getAllAppLocales();
+        sort($appLocales);
         sort($this->langs);
-        $this->assertEquals(implode(':', $configLocales), implode(':', $this->langs), 'app.locales configuration variable does not match those found in lang files');
+        $this->assertEquals(implode(':', $this->langs), implode(':', $appLocales), 'app.locales configuration variable does not match those found in lang files');
     }
 
     // Not part of standard phpunit test runs since we sometimes expect non-added langs.
@@ -75,14 +76,13 @@ class LanguageTest extends TestCase
         }
     }
 
-    public function test_rtl_config_set_if_lang_is_rtl()
+    public function test_views_use_rtl_if_rtl_language_is_set()
     {
-        $this->asEditor();
-        // TODO - Alter
-        $this->assertFalse(config('app.rtl'), 'App RTL config should be false by default');
+        $this->asEditor()->withHtml($this->get('/'))->assertElementExists('html[dir="ltr"]');
+
         setting()->putUser($this->users->editor(), 'language', 'ar');
-        $this->get('/');
-        $this->assertTrue(config('app.rtl'), 'App RTL config should have been set to true by middleware');
+
+        $this->withHtml($this->get('/'))->assertElementExists('html[dir="rtl"]');
     }
 
     public function test_unknown_lang_does_not_break_app()
diff --git a/tests/User/UserManagementTest.php b/tests/User/UserManagementTest.php
index a6d869b2f..93d35f5d0 100644
--- a/tests/User/UserManagementTest.php
+++ b/tests/User/UserManagementTest.php
@@ -215,7 +215,7 @@ class UserManagementTest extends TestCase
     {
         $langs = ['en', 'fr', 'hr'];
         foreach ($langs as $lang) {
-            config()->set('app.locale', $lang);
+            config()->set('app.default_locale', $lang);
             $resp = $this->asAdmin()->get('/settings/users/create');
             $this->withHtml($resp)->assertElementExists('select[name="language"] option[value="' . $lang . '"][selected]');
         }