Allows the user to set the default language for new and unauthenticated visitors.

.env.example

@@ -15,6 +15,12 @@ SITE_OWNER=mail@example.com
 # If you use Docker or similar, you can set this variable from a file by using APP_KEY_FILE
 APP_KEY=SomeRandomStringOf32CharsExactly
 
+#
+# Firefly III will launch using this language (for new users and unauthenticated visitors)
+# For a list of available languages: https://github.com/firefly-iii/firefly-iii/tree/master/resources/lang
+#
+# If text is still in English, remember that not everything may have been translated.
+DEFAULT_LANGUAGE=en_US
 
 # Change this value to your preferred time zone.
 # Example: Europe/Amsterdam

config/app.php

@@ -31,7 +31,7 @@ return [
     'debug'           => env('APP_DEBUG', false),
     'url'             => envNonEmpty('APP_URL', 'http://localhost'),
     'timezone'        => envNonEmpty('TZ', 'UTC'),
-    'locale'          => 'en_US',
+    'locale'          => envNonEmpty('DEFAULT_LANGUAGE', 'en_US'),
     'fallback_locale' => 'en_US',
     'key'             => env('APP_KEY'),
     'cipher'          => 'AES-256-CBC',

config/firefly.php

@@ -546,7 +546,7 @@ return [
         'range' => 200,
     ],
     'default_currency' => 'EUR',
-    'default_language' => 'en_US',
+    'default_language' => envNonEmpty('DEFAULT_LANGUAGE', 'en_US'),
     'search_modifiers' => ['amount_is', 'amount', 'amount_max', 'amount_min', 'amount_less', 'amount_more', 'source', 'destination', 'category',
                            'budget', 'bill', 'type', 'date', 'date_before', 'date_after', 'on', 'before', 'after', 'from', 'to', 'tag', 'created_on',
                            'updated_on'],