Well, it is obvious to us and to many other people who have not had any problem doing their training that you need to build your own language model. So please file issue on Github explaining exactly what you miss or how you would word it. Better even if you send a patch adding the missing documentation.
Let me repeat: we cannot get into your head. We are deep down into the project, some things that are so obvious to us we can’t even know why it’s complicated to others. This is no arrogance or pushback.
If people don’t tell us that they don’t understand the current doc or else, we can’t improve.