I have added Hindi, Marathi and Kannada to our translation portal:

https://crowdin.com/project/mastodon

Mastodon — Translation Project on Crowdin

Help us translate Mastodon and bring it to the world!

Crowdin
@Gargron Can I mention that the Telugu localization I’ve seen thus far has been *excellent*. More needs to be translated obviously, but so far so good.