diff --git a/app/Config/App.php b/app/Config/App.php
index a7c7b770..a67511d5 100644
--- a/app/Config/App.php
+++ b/app/Config/App.php
@@ -98,7 +98,19 @@ class App extends BaseConfig
      *
      * @var list<string>
      */
-    public array $supportedLocales = ['en', 'fr', 'pl', 'de', 'pt-BR', 'nn-NO', 'es', 'zh-Hans', 'ca'];
+    public array $supportedLocales = [
+        'en',
+        'fr',
+        'pl',
+        'de',
+        'pt-BR',
+        'nn-NO',
+        'es',
+        'zh-Hans',
+        'ca',
+        'br',
+        'sr-Latn',
+    ];
 
     /**
      * --------------------------------------------------------------------------
diff --git a/app/Language/.rsync-filter b/app/Language/.rsync-filter
index 2a742b26..c6a78436 100644
--- a/app/Language/.rsync-filter
+++ b/app/Language/.rsync-filter
@@ -7,4 +7,6 @@
 + es/***
 + zh-Hans/***
 + ca/***
++ br/***
++ sr-Latn/***
 - **
diff --git a/app/Language/sr_Latn/Comment.php b/app/Language/sr-Latn/Comment.php
similarity index 100%
rename from app/Language/sr_Latn/Comment.php
rename to app/Language/sr-Latn/Comment.php
diff --git a/app/Language/sr_Latn/Common.php b/app/Language/sr-Latn/Common.php
similarity index 100%
rename from app/Language/sr_Latn/Common.php
rename to app/Language/sr-Latn/Common.php
diff --git a/app/Language/sr_Latn/Episode.php b/app/Language/sr-Latn/Episode.php
similarity index 100%
rename from app/Language/sr_Latn/Episode.php
rename to app/Language/sr-Latn/Episode.php
diff --git a/app/Language/sr_Latn/Fediverse.php b/app/Language/sr-Latn/Fediverse.php
similarity index 100%
rename from app/Language/sr_Latn/Fediverse.php
rename to app/Language/sr-Latn/Fediverse.php
diff --git a/app/Language/sr_Latn/Home.php b/app/Language/sr-Latn/Home.php
similarity index 100%
rename from app/Language/sr_Latn/Home.php
rename to app/Language/sr-Latn/Home.php
diff --git a/app/Language/sr_Latn/Page.php b/app/Language/sr-Latn/Page.php
similarity index 100%
rename from app/Language/sr_Latn/Page.php
rename to app/Language/sr-Latn/Page.php
diff --git a/app/Language/sr_Latn/Podcast.php b/app/Language/sr-Latn/Podcast.php
similarity index 100%
rename from app/Language/sr_Latn/Podcast.php
rename to app/Language/sr-Latn/Podcast.php
diff --git a/app/Language/sr_Latn/Post.php b/app/Language/sr-Latn/Post.php
similarity index 100%
rename from app/Language/sr_Latn/Post.php
rename to app/Language/sr-Latn/Post.php
diff --git a/modules/Admin/Language/.rsync-filter b/modules/Admin/Language/.rsync-filter
index 2a742b26..c6a78436 100644
--- a/modules/Admin/Language/.rsync-filter
+++ b/modules/Admin/Language/.rsync-filter
@@ -7,4 +7,6 @@
 + es/***
 + zh-Hans/***
 + ca/***
++ br/***
++ sr-Latn/***
 - **
diff --git a/modules/Admin/Language/sr_Latn/AboutCastopod.php b/modules/Admin/Language/sr-Latn/AboutCastopod.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/AboutCastopod.php
rename to modules/Admin/Language/sr-Latn/AboutCastopod.php
diff --git a/modules/Admin/Language/sr_Latn/Breadcrumb.php b/modules/Admin/Language/sr-Latn/Breadcrumb.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Breadcrumb.php
rename to modules/Admin/Language/sr-Latn/Breadcrumb.php
diff --git a/modules/Admin/Language/sr_Latn/Charts.php b/modules/Admin/Language/sr-Latn/Charts.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Charts.php
rename to modules/Admin/Language/sr-Latn/Charts.php
diff --git a/modules/Admin/Language/sr_Latn/Common.php b/modules/Admin/Language/sr-Latn/Common.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Common.php
rename to modules/Admin/Language/sr-Latn/Common.php
diff --git a/modules/Admin/Language/sr_Latn/Countries.php b/modules/Admin/Language/sr-Latn/Countries.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Countries.php
rename to modules/Admin/Language/sr-Latn/Countries.php
diff --git a/modules/Admin/Language/sr_Latn/Dashboard.php b/modules/Admin/Language/sr-Latn/Dashboard.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Dashboard.php
rename to modules/Admin/Language/sr-Latn/Dashboard.php
diff --git a/modules/Admin/Language/sr_Latn/Episode.php b/modules/Admin/Language/sr-Latn/Episode.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Episode.php
rename to modules/Admin/Language/sr-Latn/Episode.php
diff --git a/modules/Admin/Language/sr_Latn/EpisodeNavigation.php b/modules/Admin/Language/sr-Latn/EpisodeNavigation.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/EpisodeNavigation.php
rename to modules/Admin/Language/sr-Latn/EpisodeNavigation.php
diff --git a/modules/Admin/Language/sr_Latn/Fediverse.php b/modules/Admin/Language/sr-Latn/Fediverse.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Fediverse.php
rename to modules/Admin/Language/sr-Latn/Fediverse.php
diff --git a/modules/Admin/Language/sr_Latn/Home.php b/modules/Admin/Language/sr-Latn/Home.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Home.php
rename to modules/Admin/Language/sr-Latn/Home.php
diff --git a/modules/Admin/Language/sr_Latn/Install.php b/modules/Admin/Language/sr-Latn/Install.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Install.php
rename to modules/Admin/Language/sr-Latn/Install.php
diff --git a/modules/Admin/Language/sr_Latn/Navigation.php b/modules/Admin/Language/sr-Latn/Navigation.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Navigation.php
rename to modules/Admin/Language/sr-Latn/Navigation.php
diff --git a/modules/Admin/Language/sr_Latn/Notifications.php b/modules/Admin/Language/sr-Latn/Notifications.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Notifications.php
rename to modules/Admin/Language/sr-Latn/Notifications.php
diff --git a/modules/Admin/Language/sr_Latn/Page.php b/modules/Admin/Language/sr-Latn/Page.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Page.php
rename to modules/Admin/Language/sr-Latn/Page.php
diff --git a/modules/Admin/Language/sr_Latn/Pager.php b/modules/Admin/Language/sr-Latn/Pager.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Pager.php
rename to modules/Admin/Language/sr-Latn/Pager.php
diff --git a/modules/Admin/Language/sr_Latn/Person.php b/modules/Admin/Language/sr-Latn/Person.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Person.php
rename to modules/Admin/Language/sr-Latn/Person.php
diff --git a/modules/Admin/Language/sr_Latn/Platforms.php b/modules/Admin/Language/sr-Latn/Platforms.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Platforms.php
rename to modules/Admin/Language/sr-Latn/Platforms.php
diff --git a/modules/Admin/Language/sr_Latn/Podcast.php b/modules/Admin/Language/sr-Latn/Podcast.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Podcast.php
rename to modules/Admin/Language/sr-Latn/Podcast.php
diff --git a/modules/Admin/Language/sr_Latn/PodcastNavigation.php b/modules/Admin/Language/sr-Latn/PodcastNavigation.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/PodcastNavigation.php
rename to modules/Admin/Language/sr-Latn/PodcastNavigation.php
diff --git a/modules/Admin/Language/sr_Latn/Settings.php b/modules/Admin/Language/sr-Latn/Settings.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Settings.php
rename to modules/Admin/Language/sr-Latn/Settings.php
diff --git a/modules/Admin/Language/sr_Latn/Soundbite.php b/modules/Admin/Language/sr-Latn/Soundbite.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/Soundbite.php
rename to modules/Admin/Language/sr-Latn/Soundbite.php
diff --git a/modules/Admin/Language/sr-Latn/Validation.php b/modules/Admin/Language/sr-Latn/Validation.php
new file mode 100644
index 00000000..d83783d4
--- /dev/null
+++ b/modules/Admin/Language/sr-Latn/Validation.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright  2020 Ad Aures
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
+ * @link       https://castopod.org/
+ */
+
+return [
+    'min_dims' =>
+        '{field} ili nije slika ili nije dovoljne dužine/visine.',
+    'is_image_ratio' =>
+        '{field} ili nije slike ili nije u pravom odnosu veličina.',
+    'is_json' => '{field} contains invalid JSON.',
+];
diff --git a/modules/Admin/Language/sr_Latn/VideoClip.php b/modules/Admin/Language/sr-Latn/VideoClip.php
similarity index 100%
rename from modules/Admin/Language/sr_Latn/VideoClip.php
rename to modules/Admin/Language/sr-Latn/VideoClip.php
diff --git a/modules/Install/Language/.rsync-filter b/modules/Install/Language/.rsync-filter
index 2a742b26..c6a78436 100644
--- a/modules/Install/Language/.rsync-filter
+++ b/modules/Install/Language/.rsync-filter
@@ -7,4 +7,6 @@
 + es/***
 + zh-Hans/***
 + ca/***
++ br/***
++ sr-Latn/***
 - **
diff --git a/modules/Install/Language/sr_Latn/Install.php b/modules/Install/Language/sr-Latn/Install.php
similarity index 100%
rename from modules/Install/Language/sr_Latn/Install.php
rename to modules/Install/Language/sr-Latn/Install.php