I totally agree with you! Learning the language of mathematics, specifically spoken in this case, is an important part in learning mathematics. I think it is really important to discuss proofs and ideas with your friends because of this.
Another problem is that most of the literature and the lectures are in English but you often discuss in another language. So you have to both do the translation from written to spoken mathematics and the translation from English to, in my case, Swedish. This easily leads to half translated English words but I try to avoid that as much as possible.
I agree! You should always remember that (about) half of the people perform under the average and there is no real way around that. Not everyone can reach the top and that is something I think you need to accept at times.
