Avoid D flat major. :-)
I'll be bold and disagree. G-flat is ges in Dutch (3 characters) and gf in
English (2 characters). If you're typesetting a piece in D-flat major, the 33%
redundancy for every black-key note in Dutch will add up quickly.
But they _do_ do something in Nederlands for people whose language it is.
They take up space but don't /do/ anything in
return for the extra finger effort.
Each to his own - the beauty of lilypond.
Andrew