All the areas where Catalan is spoken as a mothertongue:

- https://en.wikipedia.org/wiki/Alghero

- https://en.wikipedia.org/wiki/Andorra

- https://en.wikipedia.org/wiki/Balearic_Islands

- https://en.wikipedia.org/wiki/Pyr%C3%A9n%C3%A9es-Orientales

- https://en.wikipedia.org/wiki/Catalonia

- https://en.wikipedia.org/wiki/Valencian_Community

- https://en.wikipedia.org/wiki/Aragon

All of them share the coat of arms of the crown of Aragon: https://en.wikipedia.org/wiki/Coat_of_arms_of_the_Crown_of_A... . Thus using the "four red pallets on a gold background" represents all the speakers in different European countries.