In football, you can't go an complain that you don't understand your teammate, you getting paid $200 000 a week, so shut up and make it happen. Park Ji Sung and Patrice Evra became best friends yet one spoke korean and the other french, teammates would laugh commenting on how they don't know how they communicate. The issue is that they were both willing to learn to understand each other, having mutual respect for each others culture but bottom line no football player can use language as an excuse.
My first language is English, so i was amused when moving to LA, an asian girl from UCLA was at one of the teller windows and i guess that she could not fully understand this girl so she just bravely says to here coworkers that "this asian girl is so dumb, how did she get into UCLA, she can't even fill out a deposit slip". The amazing thing is that she felt so natural saying it as she knew other americans will not mind what she said, even though she is a teller and the young girl is attending a top U.S College.
I would also like to add that many football coaches take jobs where they cannot speak the home language fluently but are still successful. I feel that Europeans are more accepting of foreign accents than Americans and i have worked in Europe and stay in the U.S.