HiWhile translating I saw that the <lilypond> tag recognized by lilypond-book is called environment (as \lilypond{} in LaTeX).
Wouldn't it be more correct to call it tag?
Here's the part of the Usage manual where HTML is discussed: https://gitlab.com/lilypond/lilypond/-/blob/master/Documentation/en/usage/lilypond-book.itely#L562 I hate these nitpicks :-)