Quoting from this excellent answer:
If you read enough math papers you'll find that there are certain linguistic ticks that people pick up from each other
So here's a question (primarily for you native English speakers out there, I guess):
Are there any particularly annoying language mistakes that you often see in mathematical writing (presumably by foreigners who are copying the mistake from other foreigners)?
A list of common errors to avoid might be useful to us non-native speakers. As an example of what I have in mind, I can mention a phrase that sounds wrong to my ears, but which I have come across countless times: "This allows to prove...".