Hello!
If you haven't met me, I'm Susan Lane, the member of the App Inventor development team in charge of translations.
We're dependent on our community to translate App Inventor into an ever-growing list of languages, allowing us to reach as many people as possible in their native language. If your language is missing or incomplete, please consider becoming a translator.
In particular, we really need people to translate right-to-left languages such as Arabic and Hebrew. We have a right-to-left version of the site ready for beta testing, but we don't have a translation to test it with.
I have created a new category on this forum to discuss translations here: https://community.appinventor.mit.edu/c/translating-app-inventor/28