No borders are safe!
Looks like we have some imperial-minded, or at least very nostalgiac, map-makers.
Catalunya's northern border hasn't looked like this since 1659!
Apparently fewer than 4% of people in south-west France understand Catalan today- a very heavy-handed French language policy basically killed all regional dialects (not just Catalan).
From an article in yesterday's El Pais, this map showing where Catalan is spoken: