[NSFW] Url langue ?lang=it no /it

My site uses this kind of url ?lang=en for languages that doesn’t generate error 500 in the server, but from the seller page if I select the language change it gives me error 404 with a url like /en/store/foo, how can I change it?

Hi @cirotorelli, may I know which multilingual plugin are you using so we can assist you accordingly.

WPML