Change Lyrics fonts

[Robert Clausecker]

Changes like italic or smaller are not my goal. I wanted to set the
font-family to another one.

En detail I made a score for some chinese lyrics. The default fonts
aren't very pretty for chinese, so I wanted to used a special font (For
chinese-speakers: I wanted to use a 楷體/楷体 font) for one lyrics track
only, because I made three lyrics: One in traditional, one in simplified
chinese and one in latin. The special font looks very poor on text
written in latin characters.

Maybe somebody could help me.