As of now there are a lot of pending languages to be added in Transifex which includes some majorly spoken languages like Bengali.
Onto this I’d like to add to the fact that multiple duplicate languages exist in Transifex as of now. This duplication is usually caused due differences in same language over different regions. However, some languages like Hindi and Russian do not vary over regions like English(US,UK and Australian). These specific languages like Hindi(India) and Russian(Russia) can be removed. This would be a wise decision at the moment instead of distributing the contributions made by contributors to the same language over period of time.
I was seeking permission to add/remove them or if the authorities think this is something that should be done by them, then I’d like to inform them.