First, one of the two Welsh words for owl is gwdihŵ [ɡʊdiˈhuː]. Second, there's a moment in WTP when Owl says, "Oh you are, are you?" I was delighted to realise that this can be translated into Welsh as "O wyt, wyt?" [oː uːɨtuːɨt]! I think it might have been a little lost on my kids though.