http://discuss.i2p/viewtopic.php?p=481
The following languages are currently planned for translation: ar, az, bg, br, bs, ca, cs, da, de, el, en, es, es_AR, fa, fi, fil, fr, gl, hi, hr, hu, in, it, iw, ja, ko, mg, mk, nb, nl, nn, om, pl, pt, pt_BR, ro, ru, sk, sl, sq, sr, sv, tr, uk, ur, vi, zh, zh_TW.