I believe they said no word in the English dictionary. And I think Cxm and Crwth are Galic, not english. Sorry if I come off as rude, I don't mean to.
Sporange is an English word, & as for the mountain in Wales, a name is a name, (plus Wales is a part of the U. K., so it works).
As for the Gaelic, that may be where the roots are from, but they are recognized as English words, too. It's not the first time languages have taken words from each other.
- South paw is a term for left handed people.
- South Park is a real city in Colorado.
- South America has 12 independent nations on it.