Yes, there is a place with instructions on how to do this. For example here ( How to modify Firmware file | GeekDoing ). The languages are set in the firmware, for example, here ( Firmware 2.3.0.6 | "STOCK" (CN, ZH, EN, ES, RU, KO, FR, DE, ID, PL, IT, JA, TH, AR, VI, PT, NL, TR, UK) | GeekDoing...