Thank you, but nothing new there, I’m afraid. I am a professional IT trainer and programmer. The way “we” do this, is what I already told, la[ALT0160][ALT0173][ALT0160]la, where ASCII Code [ALT0160] is a non-breaking space, [ALT0173] is a non-breaking hyphen. That SHOULD work under Windows.
As I also said, in Dorico the non-breaking space inserted as an ASCII Code is just fine, but the non-breaking hyphen first APPEARS in lyric popover, but then vanishes when the non-breaking space is added (it seems to overwrite the hyphen). Font is Academico.
I tried several other very standard fonts, too, from Arial to Times New Roman to Courier New. All the time the same problem.
Solution: Utilising for example the Windows Character Map, the Academico (or any other font) STANDARD Hyphen-Minus [U+002D (0x2D)] can be copied to the Windows clipboard and pasted to Dorico lyrics. Sort of surprisingly, this does not advance the lyrics cursor. Works fine but this should not be the way for us to have to do it. But anyway, Academico still CAN be used.