According to some posts about poor translation of app such this https://fold.it/portal/node/991881#comment-37622 and possible convenience of using of Fold.it in another languages, there might be necessity to organize translation by the best way.
I am not advertiser. I just want to consider some online public and free crowdsourcing tools to translate Fold.it.
They are: https://www.oneskyapp.com/how-it-works/translation-management-platform/, https://crowdin.com/page/open-source-project-setup-request
Let's take a short brief of pros and cons and make a decision.
From my side, I can help to organize it by the best way to give other users such opportunity