Yup, pommes de terre. In Dutch is “aardappel”, which is more literally earthapple. But I will add, the apple part isn’t referring to the fruit, but means more like “a spherical object”.
Also the French used aardappel to create the word pomme de terre for it in 1716, as they couldn’t pronounce the Dutch word.
It’s funny how Dutch doesn’t shy away from loaning French words, despite the difference. Examples are chauffeur, etalage, cadeau, auto and medaille.
I don’t agree that aardappel is hard to pronounce in general if you’re an English speaker though. Check it out: https://en.m.wiktionary.org/wiki/aardappel