diff --git a/modules/system/lang/cs/lang.php b/modules/system/lang/cs/lang.php
index dff4112c4..cf3a690dc 100644
--- a/modules/system/lang/cs/lang.php
+++ b/modules/system/lang/cs/lang.php
@@ -6,30 +6,30 @@ return [
         'tagline' => 'Getting back to basics'
     ],
     'locale' => [
-        'cs' => 'Czech',
-        'en' => 'English',
-        'de' => 'German',
-        'el' => 'Greek',
-        'es' => 'Spanish',
-        'es-ar' => 'Spanish (Argentina)',
-        'fa' => 'Persian',
-        'fr' => 'French',
-        'hu' => 'Hungarian',
+        'cs' => 'Čeština',
+        'en' => 'Angličtina',
+        'de' => 'Němčina',
+        'el' => 'Řečtina',
+        'es' => 'Španělština',
+        'es-ar' => 'Španělština (Argentinská)',
+        'fa' => 'Perština',
+        'fr' => 'Francouzština',
+        'hu' => 'Maďarština',
         'id' => 'Bahasa Indonesia',
-        'it' => 'Italian',
-        'ja' => 'Japanese',
-        'lv' => 'Latvian',
+        'it' => 'Italština',
+        'ja' => 'Japonština',
+        'lv' => 'Litevština',
         'nb-no' => 'Norwegian (Bokmål)',
-        'nl' => 'Dutch',
-        'pl' => 'Polish',
-        'pt-br' => 'Portuguese (Brazil)',
-        'ro' => 'Romanian',
-        'ru' => 'Russian',
-        'sv' => 'Swedish',
-        'sk' => 'Slovak (Slovakia)',
-        'tr' => 'Turkish',
-        'zh-cn' => 'Chinese (China)',
-        'zh-tw' => 'Chinese (Taiwan)'
+        'nl' => 'Holandština',
+        'pl' => 'Polština',
+        'pt-br' => 'Portugalština (Brazilská)',
+        'ro' => 'Rumunština',
+        'ru' => 'Ruština',
+        'sv' => 'Švédština',
+        'sk' => 'Slovenština',
+        'tr' => 'Turečtina',
+        'zh-cn' => 'Čínštína (Čína)',
+        'zh-tw' => 'Čínštína (Tchaj-wan)'
     ],
     'directory' => [
         'create_fail' => 'Nelze vytvořit složku: :name'
diff --git a/modules/system/lang/de/lang.php b/modules/system/lang/de/lang.php
index 67e3c77ca..7c463d583 100644
--- a/modules/system/lang/de/lang.php
+++ b/modules/system/lang/de/lang.php
@@ -6,19 +6,30 @@ return [
         'tagline' => 'Zurück zum Wesentlichen',
     ],
     'locale' => [
+        'cs' => 'Tschechisch',
         'en' => 'English',
-        'nl' => 'Dutch',
-        'ja' => 'Japanese',
-        'sv' => 'Swedish',
-        'tr' => 'Turkish',
         'de' => 'German',
-        'ru' => 'Russian',
-        'fr' => 'French',
-        'it' => 'Italian',
-        'ro' => 'Romana',
-        'pt-br' => 'Brazilian Portuguese',
+        'el' => 'Greek',
+        'es' => 'Spanish',
+        'es-ar' => 'Spanish (Argentina)',
         'fa' => 'Persian',
-        'nb-no' => 'Norwegisch (Bokmål)'
+        'fr' => 'French',
+        'hu' => 'Hungarian',
+        'id' => 'Bahasa Indonesia',
+        'it' => 'Italian',
+        'ja' => 'Japanese',
+        'lv' => 'Latvian',
+        'nb-no' => 'Norwegisch (Bokmål)',
+        'nl' => 'Dutch',
+        'pl' => 'Polish',
+        'pt-br' => 'Portuguese (Brazil)',
+        'ro' => 'Romana',
+        'ru' => 'Russian',
+        'sv' => 'Swedish',
+        'sk' => 'Slovak (Slovakia)',
+        'tr' => 'Turkish',
+        'zh-cn' => 'Chinese (China)',
+        'zh-tw' => 'Chinese (Taiwan)'
     ],
     'directory' => [
         'create_fail' => "Konnte Verzeichnis: :name nicht erstellen",
diff --git a/modules/system/lang/el/lang.php b/modules/system/lang/el/lang.php
index f7cac295e..22b0739d3 100644
--- a/modules/system/lang/el/lang.php
+++ b/modules/system/lang/el/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Επιστροφή στα βασικά'
     ],
     'locale' => [
+        'cs' => 'Τσέχος',
         'en' => 'Αγγλικά',
         'de' => 'Γερμανικά',
         'el' => 'Ελληνικά',
diff --git a/modules/system/lang/en/lang.php b/modules/system/lang/en/lang.php
index 0a814a82f..fa2d2a72d 100644
--- a/modules/system/lang/en/lang.php
+++ b/modules/system/lang/en/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Getting back to basics'
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'English',
         'de' => 'German',
         'el' => 'Greek',
diff --git a/modules/system/lang/es-ar/lang.php b/modules/system/lang/es-ar/lang.php
index fc5438f57..d00502b0d 100644
--- a/modules/system/lang/es-ar/lang.php
+++ b/modules/system/lang/es-ar/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Getting back to basics',
     ],
     'locale' => [
+        'cs' => 'Checo',
         'en' => 'Inglés',
         'nl' => 'Holandés',
         'ja' => 'Japonés',
diff --git a/modules/system/lang/es/lang.php b/modules/system/lang/es/lang.php
index 921405ac1..69287df5d 100644
--- a/modules/system/lang/es/lang.php
+++ b/modules/system/lang/es/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Getting back to basics',
     ],
     'locale'         => [
+        'cs'    => 'Checo',
         'en'    => 'Inglés',
         'nl'    => 'Holandés',
         'ja'    => 'Japonés',
diff --git a/modules/system/lang/fa/lang.php b/modules/system/lang/fa/lang.php
index daa9b61ef..7e264e9e0 100644
--- a/modules/system/lang/fa/lang.php
+++ b/modules/system/lang/fa/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'بازگشت به گذشته',
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'انگلیسی',
         'de' => 'آلمانی',
         'es' => 'اسپانیایی',
diff --git a/modules/system/lang/fr/lang.php b/modules/system/lang/fr/lang.php
index f67aaddbb..6ec7f7070 100644
--- a/modules/system/lang/fr/lang.php
+++ b/modules/system/lang/fr/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Retourner à l’essentiel',
     ],
     'locale' => [
+        'cs' => 'Tchèque',
         'en' => 'Anglais',
         'de' => 'Allemand',
         'el' => 'Grec',
diff --git a/modules/system/lang/hu/lang.php b/modules/system/lang/hu/lang.php
index d4dd9656e..acabc24b2 100644
--- a/modules/system/lang/hu/lang.php
+++ b/modules/system/lang/hu/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Visszatérés az alapokhoz'
     ],
     'locale' => [
+        'cs' => 'Cseh',
         'en' => 'Angol',
         'de' => 'Német',
         'el' => 'Görög',
diff --git a/modules/system/lang/id/lang.php b/modules/system/lang/id/lang.php
index deec10fbe..10f3b7e4d 100644
--- a/modules/system/lang/id/lang.php
+++ b/modules/system/lang/id/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Dapati kembali yang mendasar'
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'Inggris',
         'de' => 'Jerman',
         'es' => 'Spanyol',
diff --git a/modules/system/lang/it/lang.php b/modules/system/lang/it/lang.php
index 4d64bfa6f..4d7211e03 100644
--- a/modules/system/lang/it/lang.php
+++ b/modules/system/lang/it/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Tornare alle origini',
     ],
     'locale' => [
+        'cs' => 'Ceco',
         'en' => 'Inglese',
         'de' => 'Tedesco',
         'es' => 'Spagnolo',
diff --git a/modules/system/lang/ja/lang.php b/modules/system/lang/ja/lang.php
index 9e6117739..1f606fd7e 100644
--- a/modules/system/lang/ja/lang.php
+++ b/modules/system/lang/ja/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => '基本に戻ろう！',
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'English',
         'de' => 'German',
         'es' => 'Spanish',
diff --git a/modules/system/lang/lv/lang.php b/modules/system/lang/lv/lang.php
index 35c856332..793f024b4 100644
--- a/modules/system/lang/lv/lang.php
+++ b/modules/system/lang/lv/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Atgriežamies pie pamatiem'
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'English',
         'de' => 'German',
         'es' => 'Spanish',
diff --git a/modules/system/lang/nb-no/lang.php b/modules/system/lang/nb-no/lang.php
index f8c36aca5..640405c7a 100644
--- a/modules/system/lang/nb-no/lang.php
+++ b/modules/system/lang/nb-no/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Getting back to basics'
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'Engelsk',
         'de' => 'Tysk',
         'es' => 'Spansk',
diff --git a/modules/system/lang/nl/lang.php b/modules/system/lang/nl/lang.php
index 5cdb6b7dd..9f8189108 100644
--- a/modules/system/lang/nl/lang.php
+++ b/modules/system/lang/nl/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Terug naar de basis',
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'Engels',
         'nl' => 'Nederlands',
         'ja' => 'Japans',
diff --git a/modules/system/lang/pl/lang.php b/modules/system/lang/pl/lang.php
index 28d387aa2..a87c57f85 100644
--- a/modules/system/lang/pl/lang.php
+++ b/modules/system/lang/pl/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Getting back to basics'
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'Angielski',
         'de' => 'Niemiecki',
         'es' => 'Hiszpański',
diff --git a/modules/system/lang/pt-br/lang.php b/modules/system/lang/pt-br/lang.php
index 93b0a68f8..103cea1eb 100644
--- a/modules/system/lang/pt-br/lang.php
+++ b/modules/system/lang/pt-br/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Voltando ao básico',
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'Inglês',
         'de' => 'Alemão',
         'es' => 'Espanhol',
diff --git a/modules/system/lang/ro/lang.php b/modules/system/lang/ro/lang.php
index cf0dcdf30..296231200 100644
--- a/modules/system/lang/ro/lang.php
+++ b/modules/system/lang/ro/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Intoarcerea la elementele de baza',
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'Engleza',
         'nl' => 'Olandeza',
         'ja' => 'Japoneza',
diff --git a/modules/system/lang/ru/lang.php b/modules/system/lang/ru/lang.php
index fd3e0ed8f..5ee6bc233 100644
--- a/modules/system/lang/ru/lang.php
+++ b/modules/system/lang/ru/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Возвращение к истокам'
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'English',
         'de' => 'German',
         'es' => 'Spanish',
diff --git a/modules/system/lang/sv/lang.php b/modules/system/lang/sv/lang.php
index d92a6bbd8..e1e047040 100644
--- a/modules/system/lang/sv/lang.php
+++ b/modules/system/lang/sv/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Getting back to basics',
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'English',
         'de' => 'German',
         'es' => 'Spanish',
diff --git a/modules/system/lang/tr/lang.php b/modules/system/lang/tr/lang.php
index 3e168db7e..6b33f99b5 100644
--- a/modules/system/lang/tr/lang.php
+++ b/modules/system/lang/tr/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => 'Basitliğe dönüş...'
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'English (United States)',
         'de' => 'Deutsch (Deutschland)',
         'es' => 'Español (Spanish)',
diff --git a/modules/system/lang/zh-cn/lang.php b/modules/system/lang/zh-cn/lang.php
index 7a2d24196..e349ecba4 100644
--- a/modules/system/lang/zh-cn/lang.php
+++ b/modules/system/lang/zh-cn/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => '欢迎使用October CMS！'
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'English',
         'de' => 'German',
         'es' => 'Spanish',
diff --git a/modules/system/lang/zh-tw/lang.php b/modules/system/lang/zh-tw/lang.php
index 9f5648340..46facf91e 100644
--- a/modules/system/lang/zh-tw/lang.php
+++ b/modules/system/lang/zh-tw/lang.php
@@ -6,6 +6,7 @@ return [
         'tagline' => '登入'
     ],
     'locale' => [
+        'cs' => 'Czech',
         'en' => 'English',
         'de' => 'German',
         'es' => 'Spanish',