fix #29341, at least partial

but I think an update to/from Transifex is needed to make it work
another fix for #29341, selectionfilter
singular vs. plural
fix #23515
fix #29246: unrecognized chords with symbols imported with markup
update tests
Merge pull request #1117 from Jojo-Schmitz/translation

fix #29341, missing translations, more work
Merge pull request #1118 from MarcSabatella/29246-chord-symbol-markup

fix #29246: unrecognized chords with symbols imported with markup
fix #24138
fix #29391