iMediaWiki:Apihelp-query+languageinfo-paramvalue-prop-fallbacks
The language codes of the fallback languages configured for this language. The implicit final fallback to 'en' is not included (but some languages may fall back to 'en' explicitly).
The language codes of the fallback languages configured for this language. The implicit final fallback to 'en' is not included (but some languages may fall back to 'en' explicitly).