Nelumdini If you did a Language customisation a) they effect only your Moodle installation b) they replace the original (English) strings. Moodle has much more sophisticated multi-language capabilities. The keyword is Laguage packs.
It is very important to know that MoodleBox hasn't changed a singe line of code in the original Moodle from Moodle downloads. So MoodleBox has all the language features of Moodle - and it makes much sense to get these information from moodle.org, specifically from its Languages forum. In fact, all the information you need is in the Moodle documentation. The initial pages are linked to the header of that forum.
Your work, reaching an underrepresented population, sounds exactly the type of application MoodleBox is made for. Keep up the good work!