mw.wikibase.description / mw.wikibase.label and similar functions now return also lang.
This is breaking change, given how Scribunto interprets multiple return values (https://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#Returning_text).
This should be either reverted/have different signature, or someone should go over all Lua Modules in all wikis and validate it is fixed. I fixed locally in hewiki 2 modules with such change: https://he.wikipedia.org/w/index.php?title=%D7%99%D7%97%D7%99%D7%93%D7%94:Wikibase&diff=prev&oldid=19262488