You can help us translate ever part of OhMyForm, when you want to add a new language please write either in discord or create a new issue.
You can create issues to report bug or request feature.
Here is how to setup your development environment:
$ git clone https://github.com/ohmyform/ohmyform
$ docker-compose up
You should have at this point have a working instance to play with at http://localhost:5000 within moments.