Yes #[6]​ did all the translation work, #[7]​ has made the app look and feel a lot better. #[8]​ has implemented profile picture uploading, made the profile view nicer, and lots of other stuff. #[9]​ did image and video uploading, and many other things. #[10]​ has done lots of image performance optimizations. Its open source, anyone can join and contribute code.