fix language selector and belive

app/controllers/application_controller.rb

@@ -8,7 +8,6 @@ class ApplicationController < ActionController::Base
 
   def change_locale
     origin_url = request.referer || request.origin
-
     uri = URI.parse(origin_url)
     query_params = Rack::Utils.parse_nested_query(uri.query)
 
@@ -57,4 +56,8 @@ def render_error(title_key, body_key, status = :bad_request)
                      body: translate("devise.failure.#{body_key}") },
            :status => status
   end
+
+  def default_url_options
+    { locale: I18n.locale }
+  end
 end

app/helpers/auth_helper.rb

@@ -23,10 +23,10 @@ def devise?
   end
 
   def language_selector
-    test = I18n.available_locales.map do |locale|
-      [I18n.t(locale, scope: 'language'), locale]
+    languages = I18nData.languages(I18n.locale).to_a.map do |e|
+      [e.second.titleize, e.first.downcase.to_sym]
     end
-    options_for_select(test, I18n.locale)
+    languages = languages.select { |e| I18n.available_locales.include? e.second }
+    options_for_select(languages, I18n.locale)
   end
-
 end

app/views/layouts/application.html.haml

@@ -23,7 +23,7 @@
           %ul.navbar.text-gray
             -# Language selector
             %li.d-flex.align-items-center.cursor-pointer.border-start.border-end.h-100.ps-2.pe-2
-              = form_with url: change_locale_path, method: :post, local: true do |f|
+              = form_with url: "/change_locale", method: :post, local: true do |f|
                 = f.select :locale, language_selector, {}, onchange: 'this.form.submit();', class: "form-control"
             -# Devise/Mockdata
             - if Rails.env.development?

config/application.rb

@@ -26,7 +26,7 @@ class Application < Rails::Application
     # Skip views, helpers and assets when generating a new resource.
     config.autoload_paths += %W( #{config.root}/app/uploaders) #
     config.i18n.load_path += Dir[Rails.root.join('config', 'locales', '**', '*.{rb,yml}')]
-    I18n.available_locales = [:de, :en]
+    I18n.available_locales = [:de, :en, :fr]
     config.i18n.default_locale = :de
 
     config.active_record.verify_foreign_keys_for_fixtures = false

config/locales/de.yml

@@ -32,6 +32,11 @@ de:
           other: Funktionen
         picture: Bild
         title: Abschluss
+        department: Organisationseinheit
+        birthdate: Geburtsdatum
+        nationality: Nationalität
+        marital_status: Zivilstand
+        shortname: Kurzname
       project:
         description: Beschreibung
         role: Rolle und Aufgaben

config/locales/en.yml

@@ -32,6 +32,11 @@ en:
           other: Functions
         picture: Image
         title: Conclusion
+        department: Department
+        birthdate: Birthdate
+        nationality: Nationality
+        marital_status: Marital status
+        shortname: Short name
       project:
         description: Description
         role: Role and tasks
@@ -42,7 +47,7 @@ en:
         category: Category
     models:
       activity: Station
-      advanced_training: Further training
+      advanced_training: Advanced training
       company:
         one: Company
         other: Companies

config/locales/fr.yml

@@ -32,6 +32,11 @@ fr:
           other: Fonctions
         picture: Image
         title: Conclusion
+        department: Département
+        birthdate: Date de naissance
+        nationality: Nationalité
+        marital_status: Statut marital
+        shortname: Nom court
       project:
         description: Description
         role: Rôle et tâches