Some of the languages does not change by using "Change Language" button on https://labs.fedoraproject.org/hi/python-classroom/ page for example Hindi
But the same thing works on https://getfedora.org/hi/ I think we can use the same code to implement and fix it. PFA for more information.
I think they are just not translated at all. That's the reason. For example the labs.fp.o website is not translated in hindi (0%). Other languages are working fine.
https://fedora.zanata.org/webtrans/translate?project=fedora-web&iteration=labs.fedoraproject.org&localeId=hi&locale=de-DE&dswid=1411#view:doc;doc:po/labs.fedoraproject.org
I am closing this as a wontfix, because it is not a bug. getfedora.org has some strings translated, labs.fp.o not. Please reopen if you still feel this is a websites issue.
Metadata Update from @robyduck: - Issue close_status updated to: Won't fix / Can't fix - Issue status updated to: Closed (was: Open)