What’s shown in the picture is fairly solid, to be honest. The vowels remind me Italian (four heights) meets German (front unrounded vs. front rounded vs. back rounded).

/ʁ/ is being listed twice; is this an accident? Or is the consonant playing double role, as both the voiced counterpart for /x/ and as a liquid?

Vowel romanisation is a bit weird but eh, kind of tricky to do this anyway. I typically reserve letters otherwise associated with consonants for this reason; e.g. ⟨w y v⟩. But in your case it would require a lot of respelling.

Props for using a diaeresis instead of umlaut. It’s the best approach in this case, umlaut tends to create too much diacritic spam.

Main thing missing from the phonotactics are assimilation rules; for example languages typically don’t allow stuff like /np/ or /mt/, even if otherwise allowed. I also think it’s a bit strange to allow coda stops but not coda fricatives, but that might be due to “stereotypical Romance” bias from my part.

I forgot to add that end vowels fall silent when an apostrophe comes before them, technically “KHngoiengngņgöiëxuh’í” /xŋœŋŋngoieʃə/ is completely legal

Did you review the conlang in the meantime? Because the pic says nothing about apostrophes, and /xŋ/ doesn’t seem to be a valid onset in the list.