>Meetings with such team is always awkward as they internally discuss the topic in their own language during the meeting.
If English/lingua franca is to be expected, then that can be asserted thru HR or thru placatable means.
>Also their hiring practices are essentially discriminatory.
"essentially" is doing a lot of heavy lifting here. The alternative is blind hiring, which may not "solve" the "problem" - because equal opportunities does not guarantee equal equitable results. Anything else is intentionally discriminatory.
If diversity was actually a strength, then it wouldn't take such a monumental effort (of actual discrimination, no less) to achieve it.