I consider myself fluent in written & spoken French, but this really requires the ear of a native speaker.
-
If you wanted to say “I have a long tongue”, in theory it’d be “j’ai une longue langue” (or “langue longue” - ‘long’ being one of those adjectives that can go before or after depending on what you want to emphasize) - but this sounds weird to my ears, with the alliteration.
-
Similary, in England there’s a childish insult for people with glasses - “four eyes”. Logically this would be “quatre yeux” - but that too sounds weird to me. My brain keeps wanting to put a liaison between the words - phonetically, “quatre-zyeux”.