I didn't really say this in my previous point as it was going to get a bit too detailed about something not quite related to what I was describing, but when models do give me lyrics without using a web search, it has hallucinated every time.

As for searching for the lyrics, I often have to give it the title and the artist to find the song, and sometimes even have to give context of where the song is from, otherwise it'll either find a more popular English song with a similar title or still hallucinate. Luckily I know enough of the language to identify when the song is fully wrong.

No clue how well it would work with popular English songs as I've never tried those.