The problem with such a lexicon would be that there have been a lot of slang, dialect, idioms, and unofficial words that 99% of people have never heard of. Besides that, the English language is a very old language. Old English is quite similar to old Danish, for instance. Such a list would be over 99% words that most people could not use or remember effectively. I know there are courses and programs to improve vocabulary which are good for anyone, even those who already have a pretty good vocabulary. Hopefully, someone will recommend some. I am unable to do this at the moment.