diff --git a/config/locales/backend/backend.de.yml b/config/locales/backend/backend.de.yml
index cc3d5eef..67c08e3e 100644
--- a/config/locales/backend/backend.de.yml
+++ b/config/locales/backend/backend.de.yml
@@ -1,17 +1,17 @@
 de:
   errors:
-    unknown: 'An unknown error occurred'
+    unknown: 'Ein unbekannter Fehler ist aufgetreten'
     unauthorized: 'Du bist nicht autorisiert'
     not_logged_in: 'Du musst angemeldet sein, um auf diese Seite zugreifen zu können'
     not_enough_privileges: 'Du hast nicht die Berechtigung, auf diese Seite zuzugreifen'
     user_blocked_or_deleted: 'Du kannst nicht auf Dein Konto zugreifen, da es gesperrt oder gelöscht wurde.'
-    o_auth_login_error: 'There was an error logging in with %{name}. Please contact the site administrator or try a different provider.'
+    o_auth_login_error: 'Beim Einloggen mit %{name} ist ein Fehler aufgetreten. Bitte wenden Sie sich an den Administrator oder versuchen Sie einen anderen Anbieter.'
     board:
       update_order: 'Beim Neuordnen der Boards ist ein Fehler aufgetreten'
     post_status:
       update_order: 'Beim Neuordnen des Status ist ein Fehler aufgetreten'
   defaults:
-    user_full_name: 'Anonymous User'
+    user_full_name: 'Anonymer Benutzer'
   mailers:
     devise:
       welcome_greeting: 'Willkommen auf %{site_name}, %{email}!'
@@ -67,15 +67,15 @@ de:
       o_auth:
         name: 'Name'
         logo: 'Logo'
-        is_enabled: 'Enabled'
-        client_id: 'Client ID'
-        client_secret: 'Client secret'
-        authorize_url: 'Authorize URL'
-        token_url: 'Token URL'
-        profile_url: 'Profile URL'
-        scope: 'Scope'
-        json_user_name_path: 'JSON path to user name'
-        json_user_email_path: 'JSON path to user email'
+        is_enabled: 'Aktiviert'
+        client_id: 'Client-ID'
+        client_secret: 'Client-Secret'
+        authorize_url: 'URL autorisieren'
+        token_url: 'Token-URL'
+        profile_url: 'Profil-URL'
+        scope: 'Gültigkeitsbereich'
+        json_user_name_path: 'JSON-Pfad zum Benutzernamen'
+        json_user_email_path: 'JSON-Pfad zur E-Mail-Adresse'
       post_status:
         name: 'Name'
         color: 'Farbe'
@@ -107,4 +107,4 @@ de:
         blank: 'darf nicht leer sein'
         taken: 'wird bereits verwendet'
         too_short: 'ist zu kurz (mindestens %{count} Zeichen)'
-        too_long: 'is too long (maximum %{count} characters)'
+        too_long: 'ist zu lang (maximal %{count} Zeichen)'
diff --git a/config/locales/de.yml b/config/locales/de.yml
index e41a8385..dec93cd4 100644
--- a/config/locales/de.yml
+++ b/config/locales/de.yml
@@ -1,11 +1,11 @@
 de:
   common:
     validations:
-      required: '%{attribute} is required'
-      email: 'Invalid email'
-      url: 'Invalid URL'
-      password: 'Password must have at least %{n} characters'
-      password_mismatch: 'Password and password confirmation must match'
+      required: '%{attribute} ist erforderlich'
+      email: 'Ungültige E-Mail-Adresse'
+      url: 'Ungültige URL'
+      password: 'Das Passwort muss mindestens %{n} Zeichen lang sein'
+      password_mismatch: 'Passwort und Passwort-Bestätigung müssen übereinstimmen'
     forms:
       auth:
         email: 'E-Mail'
@@ -20,8 +20,8 @@ de:
         remember_me: 'Eingeloggt bleiben'
         log_in: 'Einloggen'
         sign_up: 'Registrieren'
-        log_in_with: 'Log in with %{o_auth}'
-        sign_up_with: 'Sign up with %{o_auth}'
+        log_in_with: 'Mit %{o_auth} anmelden'
+        sign_up_with: 'Mit %{o_auth} anmelden'
         profile_settings: 'Profileinstellungen'
         update_profile: 'Profil aktualisieren'
         cancel_account: 'Konto entfernen'
@@ -39,11 +39,11 @@ de:
     no_status: 'Kein Status'
     loading: 'Laden...'
     confirmation: 'Sicher?'
-    unsaved_changes: 'Unsaved changes will be lost if you leave the page.'
+    unsaved_changes: 'Ungespeicherte Änderungen gehen verloren, wenn Sie die Seite verlassen.'
     edited: 'Bearbeitet'
-    enabled: 'Enabled'
-    disabled: 'Disabled'
-    copied: 'Copied!'
+    enabled: 'Aktiviert'
+    disabled: 'Deaktiviert'
+    copied: 'Kopiert!'
     buttons:
       new: 'Neu'
       edit: 'Bearbeiten'
@@ -52,7 +52,7 @@ de:
       create: 'Erstellen'
       update: 'Speichern'
       confirm: 'Bestätigen'
-      back: 'Back'
+      back: 'Zurück'
       test: 'Test'
     datetime:
       now: 'gerade eben'
@@ -142,7 +142,7 @@ de:
       post_statuses: 'Status'
       roadmap: 'Roadmap'
       users: 'Benutzer'
-      authentication: 'Authentication'
+      authentication: 'Authentifizierung'
     info_box:
       up_to_date: 'Alle Änderungen gespeichert'
       error: 'Ein Fehler ist aufgetreten: %{message}'
@@ -185,20 +185,20 @@ de:
       status_blocked: 'Gesperrt'
       status_deleted: 'Gelöscht'
     authentication:
-      title: 'Authentication'
-      oauth_subtitle: 'OAuth providers'
-      copy_url: 'Copy URL'
+      title: 'Authentifizierung'
+      oauth_subtitle: 'OAuth-Anbieter'
+      copy_url: 'URL in Zwischenablage kopieren'
       test_page:
-        title: '%{name} OAuth test results'
-        fetched_user_data: 'Fetched user data'
-        found: 'Found'
-        summary: 'Summary'
-        valid_configuration: 'This OAuth provider is configured correctly!'
-        warning_configuration: 'This OAuth provider if configured correctly, but a default name for users (%{name}) will be used.'
-        invalid_configuration: 'This OAuth provider is NOT configured correctly.'
+        title: '%{name} OAuth-Testergebnisse'
+        fetched_user_data: 'Abgerufene Nutzerdaten'
+        found: 'Gefunden'
+        summary: 'Zusammenfassung'
+        valid_configuration: 'Dieser OAuth-Anbieter ist korrekt konfiguriert!'
+        warning_configuration: 'Dieser OAuth-Anbieter ist korrekt konfiguriert, aber ein Standardname für Benutzer (%{name}) wird verwendet.'
+        invalid_configuration: 'Dieser OAuth-Anbieter ist NICHT korrekt konfiguriert.'
       form:
-        title_new: 'New OAuth provider'
-        title_edit: 'Edit OAuth provider'
-        subtitle_oauth_config: 'OAuth configuration'
-        subtitle_user_profile_config: 'User profile configuration'
-        client_secret_help: 'hidden for security purposes'
+        title_new: 'Neuer OAuth-Anbieter'
+        title_edit: 'OAuth-Anbieter bearbeiten'
+        subtitle_oauth_config: 'OAuth-Konfiguration'
+        subtitle_user_profile_config: 'Profileinstellungen'
+        client_secret_help: 'aus Sicherheitsgründen versteckt'
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 465d56bd..597e76df 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -194,11 +194,11 @@ en:
         found: 'Found'
         summary: 'Summary'
         valid_configuration: 'This OAuth provider is configured correctly!'
-        warning_configuration: 'This OAuth provider if configured correctly, but a default name for users (%{name}) will be used.'
+        warning_configuration: 'This OAuth provider is configured correctly, but a default name for users (%{name}) will be used.'
         invalid_configuration: 'This OAuth provider is NOT configured correctly.'
       form:
         title_new: 'New OAuth provider'
         title_edit: 'Edit OAuth provider'
         subtitle_oauth_config: 'OAuth configuration'
         subtitle_user_profile_config: 'User profile configuration'
-        client_secret_help: 'hidden for security purposes'
\ No newline at end of file
+        client_secret_help: 'hidden for security purposes'
diff --git a/config/locales/es.yml b/config/locales/es.yml
index 870fe37f..f3acb664 100644
--- a/config/locales/es.yml
+++ b/config/locales/es.yml
@@ -194,7 +194,7 @@ es:
         found: 'Found'
         summary: 'Summary'
         valid_configuration: 'This OAuth provider is configured correctly!'
-        warning_configuration: 'This OAuth provider if configured correctly, but a default name for users (%{name}) will be used.'
+        warning_configuration: 'This OAuth provider is configured correctly, but a default name for users (%{name}) will be used.'
         invalid_configuration: 'This OAuth provider is NOT configured correctly.'
       form:
         title_new: 'New OAuth provider'
diff --git a/config/locales/fr.yml b/config/locales/fr.yml
index 2cf72a38..da21d39f 100644
--- a/config/locales/fr.yml
+++ b/config/locales/fr.yml
@@ -194,7 +194,7 @@ fr:
         found: 'Found'
         summary: 'Summary'
         valid_configuration: 'This OAuth provider is configured correctly!'
-        warning_configuration: 'This OAuth provider if configured correctly, but a default name for users (%{name}) will be used.'
+        warning_configuration: 'This OAuth provider is configured correctly, but a default name for users (%{name}) will be used.'
         invalid_configuration: 'This OAuth provider is NOT configured correctly.'
       form:
         title_new: 'New OAuth provider'
diff --git a/config/locales/ja.yml b/config/locales/ja.yml
index 154ec099..26601a89 100644
--- a/config/locales/ja.yml
+++ b/config/locales/ja.yml
@@ -190,7 +190,7 @@ ja:
         found: 'Found'
         summary: 'Summary'
         valid_configuration: 'This OAuth provider is configured correctly!'
-        warning_configuration: 'This OAuth provider if configured correctly, but a default name for users (%{name}) will be used.'
+        warning_configuration: 'This OAuth provider is configured correctly, but a default name for users (%{name}) will be used.'
         invalid_configuration: 'This OAuth provider is NOT configured correctly.'
       form:
         title_new: 'New OAuth provider'
diff --git a/config/locales/ko.yml b/config/locales/ko.yml
index 2a81b7c4..ecef5bf0 100644
--- a/config/locales/ko.yml
+++ b/config/locales/ko.yml
@@ -190,7 +190,7 @@ ko:
         found: 'Found'
         summary: 'Summary'
         valid_configuration: 'This OAuth provider is configured correctly!'
-        warning_configuration: 'This OAuth provider if configured correctly, but a default name for users (%{name}) will be used.'
+        warning_configuration: 'This OAuth provider is configured correctly, but a default name for users (%{name}) will be used.'
         invalid_configuration: 'This OAuth provider is NOT configured correctly.'
       form:
         title_new: 'New OAuth provider'
diff --git a/config/locales/nl.yml b/config/locales/nl.yml
index 726767b8..08c22ae4 100644
--- a/config/locales/nl.yml
+++ b/config/locales/nl.yml
@@ -194,7 +194,7 @@ nl:
         found: 'Found'
         summary: 'Summary'
         valid_configuration: 'This OAuth provider is configured correctly!'
-        warning_configuration: 'This OAuth provider if configured correctly, but a default name for users (%{name}) will be used.'
+        warning_configuration: 'This OAuth provider is configured correctly, but a default name for users (%{name}) will be used.'
         invalid_configuration: 'This OAuth provider is NOT configured correctly.'
       form:
         title_new: 'New OAuth provider'
diff --git a/config/locales/pt.yml b/config/locales/pt.yml
index 7c659f01..68141946 100644
--- a/config/locales/pt.yml
+++ b/config/locales/pt.yml
@@ -194,7 +194,7 @@ pt:
         found: 'Found'
         summary: 'Summary'
         valid_configuration: 'This OAuth provider is configured correctly!'
-        warning_configuration: 'This OAuth provider if configured correctly, but a default name for users (%{name}) will be used.'
+        warning_configuration: 'This OAuth provider is configured correctly, but a default name for users (%{name}) will be used.'
         invalid_configuration: 'This OAuth provider is NOT configured correctly.'
       form:
         title_new: 'New OAuth provider'
diff --git a/config/locales/zh.yml b/config/locales/zh.yml
index c6b9c430..12619162 100644
--- a/config/locales/zh.yml
+++ b/config/locales/zh.yml
@@ -190,7 +190,7 @@ zh-CN:
         found: 'Found'
         summary: 'Summary'
         valid_configuration: 'This OAuth provider is configured correctly!'
-        warning_configuration: 'This OAuth provider if configured correctly, but a default name for users (%{name}) will be used.'
+        warning_configuration: 'This OAuth provider is configured correctly, but a default name for users (%{name}) will be used.'
         invalid_configuration: 'This OAuth provider is NOT configured correctly.'
       form:
         title_new: 'New OAuth provider'