Default language
Fallback language when there is no cookie and detection does not match an enabled locale.
Default language
Fallback language for visitors when no language cookie is set and auto-detection does not match an enabled language.
Where to find it
Admin → Settings → Settings (first tab) → Languages → Default language
Setting key: default_language
How it works
Must stay inside Enabled languages. The site uses this when it does not know what the visitor prefers.
Common problems
Cannot disable a language
You cannot uncheck the current default. Pick another default first, then disable the old one.
Everyone sees the wrong language
Detection may be Off, or Enabled languages is too narrow. Check Language detection.