Words are not language
Maybe because it is so simple, it sometimes gets inadvertently overlooked: Language is already taken by language.
1 idea you can steal
One idea you can steal from “Words ≠ Language” is mistaking a word for another only prevents you from understanding the first thing about either.
Mistaking fake for news, or new for fake, for example, would be forgetting fake describes fake people no matter what they’re doing with their lives. News is a different wor(l)d altogether.
Mistaking words is rather like mistaking people with a difference. The people will tell you, if need be in no uncertain terms, but your words don’t mind for self-evident reasons.
Mistake a word for another?
Words say: “BIG mistake!”
Don’t do it.