I forgot two important things, sorry:-)
You should create your own chord definitions in a separate file and store that file in the folder described above.
I am sharing my one with you (
ukulele-chords-de.ly), where I changed the Bs to Hs and the BESs to Bs (to comply with the German language).
I forgot to add that you should connect the file at the top of your lilypond doc with
This is another hack, the 'ignatzek Exceptions'
Again, you will need to define your own names, at least for certain chords.
I created a file 'extras.ly' which you should put in the above-mentioned folder.
I forgot to mention that you should also link this document (\include "extras.ly")
And add a line, preferably in \global:
\set chordNameExceptions = #chExceptions
VM