Hi, and thank you for your interest!
ScummVM is being translated using Weblate, a web tool designed to ease translating for both developers and translators.
Translation project for ScummVM currently contains 960 strings for translation and is being translated into 23 languages. Overall, these translations are 86.8% complete.
If you would like to contribute to translation of ScummVM, you need to register on this server.
Once you have activated your account just proceed to the translation section.