I am not native English speaker either but I don’t see a problem in technical English what comes to Mikrotik release notes and other things of that nature.
In my previous field of work I have been doing translations of documentation of my main field of work (mainly project documentation of my own “making”, which was my main field of work back then) to at least 2 languages and I have not been able to see issues with language in Mikrotik documentation.
Problem is in the contents and not in “semantics” - we are not dealing with “English literature” here. Look around at the world - it is not hard to find more “linguistically challenged” documentation for hardware and software of chinese or korean origin then from anywhere in Europe.