I've picked six so, just for fun which is the best new English word.
(Pronunciation in brackets)
Twp. (Toop) foolish or an idiot
Sglodion/Sglods. Chips/French fries
Mamgu (mam gee) grandmother
Ych-a-fi (uch-ah-vee) yuck/eew
Iechyd da (yek id dah) good health, cheers.
Calennig (calen nig) new years day gift. Children stick twigs in apples and sing songs to relatives for small change or bits of cheese.