I can relate to this so much. I am so afraid that something I say could be misinterpreted that I prefer to talk only formally. English is not my native language. And my communication skills aren't the best, which makes me even more hesitant.

So I end up speaking more with co-workers from the same country I am from because it becomes easier. This ends up forming bubbles :(. I wish I was able to speak freely and make friends with people from other countries also. But the risk seems much more than the reward.