What words has been adopted into English from French and means simple or lacking sophistication?

The word you're likely looking for is "naive", which is directly borrowed from the French word "naïf". It means lacking experience, wisdom, or judgment.

While it doesn't exactly translate to "simple" or "lacking sophistication" on its own, it certainly carries a connotation of those qualities.

Here are a few other words adopted from French that might fit the bill:

* "Unpretentious": This word means not trying to impress or be sophisticated.

* "Artless": Meaning natural and simple, without any attempt at cleverness or deceit.

* "Rustic": This word means simple, unsophisticated, and typical of the countryside.

* "Gauche": Meaning awkward, clumsy, and lacking social grace.

These words all convey a sense of simplicity and lack of sophistication, and they are all ultimately derived from French.