A “united” form of this language was codified at the Sanctuary of Arantzazu. An organization uses a motto in this language that translates to “keep up on both.” Schools called ikastola were set up to teach this language. Medieval songs were written in this language about battles between its speakers during the War of the Bands. A faction named for their unique wool hats clashed (-5[1])with speakers of this language for control over silver mines in one city. Speakers of this language (-5[1])owned and operated the Royal (*) Gipuzkoan Company. A pidgin based on this language was spoken in Iceland, where speakers (10[1])of this language hunted whales. Restrictions on this language by the government of Francisco Franco sparked (10[1])the creation of the ETA. For 10 points, name this language isolate (10[1])spoken by a community in northern (10[1])Spain. ■END■