MediaWiki:Apihelp-query+imageinfo-param-extmetadatalanguage
What language to fetch extmetadata in. This affects both which translation to fetch, if multiple are available, as well as how things like numbers and various values are formatted.
wiki.Alumni.NET - Your Location Information Resource
What language to fetch extmetadata in. This affects both which translation to fetch, if multiple are available, as well as how things like numbers and various values are formatted.