Anglish - english without loanwords

I had a Scottish colleague who loved to use Scottish words when talking to me. He would say “keks” for pants. Thought it was weird that I would equate trousers to underwear (b/c to brits pants is underwear).

It was fun. But anyway, if an American wants to speak Anglish, does this mean they would then be trying to use strange foreign English words in place of French and Dutch borrowed words? The idea being that many Scottish English words are likely pure English assuming they were not borrowed.

Here is an interesting stat: just as many Chinese people speak English as Americans. This is due to the population difference. So the English-speaking Chinese are inventing their own English words just like any other culture. So they are influencing the language. If they invent a word that is not borrowed, does it become incorporated into Anglish in the effort to look for pure English words that replace French and Dutch influence?

(update) Guess it’s not trivial because the article I linked claims Scottish is not a dialect of English but another language on its own. Not sure if that is widely accepted.