>>85261846They’re called nasal vowels, it’s what gives French its typical accent when speaking in English. Try saying something like, “Le parfum du pain m'attire” with the proper French pronunciation vs an American one, you’ll be able to better pinpoint which mouth muscles are being used.
https://youtu.be/o4ylX2JgE3QIf you’re far enough into Japanese to the point where your pronunciation is decent then you can honestly speak Spanish pretty well too. The vowels are similar so the jump between Spanish and Japanese accent wise is very easy. Korone pretty much pronounces Spanish perfectly but struggles with every other language, same thing with Nene.
https://youtu.be/YEN_ZXlktyMhttps://youtu.be/1FuxPcjUP9g 