Well, I made them the same height as the membership icon and facebook icon that can appear there too. I thought it would look strange if they didn't line up. I will consider shrinking them.
Speaking the same language doesn't mean you'd be part of the same community. Example, I doubt people in Ireland would join a clan called "English Community".
There are also a lot of people living in different countries now, I know Potato is Russian but he lives in Czech right now. The flags don't necessarily label nationallity.
I already mentioned someone in the Dutch clan as well with a German flag so it might be just living close to the border with the other country or just that it is their first language but live in other country since i know Larcane of the French clan as well has a Belgium flag behind his name so he might just be from the Wallonia side of Belgium and speaks French that way