Oops, I am a derp. I meant to say "they're vowels in Welsh," but our brain was like "Verbs? Vowels? Eh, they both start with V." But yeah, the W is sort of like an "oo" noise, with both short and long versions. (We do some conlanging and choosing your orthography can definitely be interesting, especially if you have sounds that don't exist in your native language.)