During Margaret's time in Béarn, it was a sovereign principality using its own coinage and language, which was a local vernacular Bearnès dialect of the Old Occitan language.
The principality at times was expanded to include Andorra and parts of Basque Country, now located in northern Spain and southern France.

Because Béarn was an independent state, it was the subject of attempted takeovers over the centuries until it was annexed by France in 1620 when King Louis XIII marched into the area with a large army, seized the nobles' estates and, sitting on his new Béarnese throne, declared that the lands were now part of France, thereby ending the principality's sovereignty.
During Margaret's time in Béarn, it was a sovereign principality using its own coinage and language, which was a local vernacular Bearnès dialect of the Old Occitan language. The principality at times was expanded to include Andorra and parts of Basque Country, now located in northern Spain and southern France. 
Because Béarn was an independent state, it was the subject of attempted takeovers over the centuries until it was annexed by France in 1620 when King Louis XIII marched into the area with a large army, seized the nobles' estates and, sitting on his new Béarnese throne, declared that the lands were now part of France, thereby ending the principality's sovereignty.
Margaret of Béarn