Here is the suggestion about C D E F G A >H< notation:
The software is now completely useless in almost all Europe countries (Germany, Poland, Croatia and much more of the Central, Eastern Europe, and Scandinavia) where we use "C D E F G A H" notation instead of “C D E F G A B”
Every meaning and professional software has an option to change a notation because it's a totally basic settings in the musician applications.
You can read more about it here:
Would love to see such option here,
@Mark what software are you using for your chord learning? I'd love to have that feature here in Yousician as well.