In the new LanguageTool website, when switching languages of the demo, there is now a flag next to the language. I noticed that if I choose the language Breton, the flag of France is shown. It’s not ideal. It would be better to show the flag of Brittany called “Gwenn-ha-du”. See: https://en.wikipedia.org/wiki/Flag_of_Brittany
Thanks, I’ve forwarded this to our designer.