I don’t mean singing in a foreign language, I mean if they aren’t enunciating their words.
There is a style of singing where the singer rolls one word into the next word, or just cuts a word off. I find it distracting and I tend to skip the song very quickly when I realize what they are doing.
While it is a popular way to sing, I have never enjoyed it. I heard some of it in the 1980s but it wasn’t widely used. Today I find a lot more singers doing it.
For me it heavily depends on the genre.
If it’s supposed to be understandable and they cut off words or mumble through multiple words, it really annoys me. Although I don’t really have a problem if I don’t understand all the words of a black metal song.