In my experience, French speakers habitually struggle with both of the th sounds in English, because I was under the impression the sound did not exist in French, where th is pronounced as t.
However, I've just come across the French word for labyrinth - "labyrinthe", and apparently it's pronounced with the English th. It's the first time I've encountered that sound in French.
If the sound exists in French, why do French speakers struggle with it in English? Or do they usually pronounce it as as t when speaking this word aloud? Is this one of the only actual instances of the English th sound in French?