Additionally;
- Is there any sign of abuse from one or more members in your team or in other teams?
I found many (like MANY) weird transfers to the same exchanges, between translators and moderators, odd behaviors on accounts like having zero comments on the blockchain, zero interactions but almost hundreds of translation contributions. Some of them doesn't even have a profile picture, but started directly with Utopian and only continue to translate through Utopian and nothing else.
With some languages it will be hard to know for sure if the people are genuine. I for one, don't know a thing about Vietnamese, so unless we know the LM longer and trust him/her, we can just never be sure if the translators are all genuine (and with that I am not saying it's that particular team who is doing any crazy transfers...I just gave an example). So I think @elear's idea of bringing in external translation experts to do checks sometimes might be the best solution for this.