How do I turn off spell check for lyrics in the Music app?

Completely agree.

Over the last few OS updates, things have gone very incoherent.

I even have the same problem for lyrics in English, as soon as there are strange words such as "ooh-ah".

There is no effect if you disable spelling checking globally in the System Settings.

Also, in those settings I cannot disable "Portuguese" for some strange reason.

Another strange thing with the lyrics panel in Music is that there is no longer a frame around the text box. That surprised me. I did not know what to do until I spotted the blinking cursor.

And so on.

Not to mention the catastrophe that Mail is (Eudora was much better).

I have already reported all these things to Apple, but they seem to prefer to output a new bunch of bugs every October. Don't ask my wife what she thinks of "Sonoma".

Bonne Soirée...