Whenever user switches site language, almost all elements are not translated (even though, i made some significant translations on POEditor, but it doesn't appear for how many times). Maybe, the strings aren't attached to POEDITOR, or translations contain errors

(screenshot from alternate account btw)

Might redo translations from POEditor to see the result, from gamejolt source code info

And one more suggestion:

Localized email alerts (the preferred language is kept on server), it will use preferred language to send important emails, like moderation alerts, user defined notifications, and account alerts such as username change