@カミカゼ - Thanks for the offer! Make sure you read the info in the first post about the lack of dictionary data for Italian, and if you're still interested, tap the mail icon next to my name and send me a DM :)
One thing that would be really cool would be a mode where the interface gradually would changes to Japanese the more you learn. E.g. once you know all words used in an interface string it automatically switches to display that string in Japanese
While that would be cool, the Japanese interface is not set up in a way so that the contents of the strings (text) can be measured and evaluated against the user's known words.
We do not typically consider adding other languages until we can find dictionary data (for example, Japanese to Farsi) that we can add to renshuu. If you happen to find (legally) free dictionary data (not a site, but a downloadable database), do let me know!
Mi amigo me habló de esta aplicación y me gustaría ayudar a traducir :) Hago mucho de mi japonés en papel y no digitalmente, ¡pero aún así me encantaría ayudar!