I sadly don’t have anything personal to add on the specific topic of Basque cuisine, but I want to encourage any Indo-European language speaker who even marginally enjoys language to read up on the situation of Basque language (Euskara). It is a language isolate, and the only extant language in mainland Europe that does not descend from Proto-Indo-European. The Basque language survived in the sliver of land at the fringes of the Roman and Moorish conquests.