Hey Lilian!
Thank you so much for bringing this up. We actually have a new feature available for reporting accessibility issues or concerns within our games and you can find more details on this under this link: https://eu.battle.net/support/en/article/000244753
I don’t have much further to add that isn’t already covered there, but I hope we’ll have the ability to help you and everyone else with these or similar accessibility concerns in our games :).