Let's not get off track here....
There's got to be one language and one only used and understood up there....It happens to be English....
Some people especially from some countries have better abilities to grasp it...Others are struggling.....
For those struggling...make an effort !!!!
If you can practice and learn English so to get beyond the standardised very limited basic ATC Crew jargon...Do it..It's worth it..
Opportunities to improve.... in all fields and in all respects.... are endless....