(johnhendersontravel.com)
Every society (another name given to txokos) has its own rules which are agreed upon by their members. There might be a vanishingly small number of societies where women are still not allowed to cook, but this an extremely rare exception rather than a widespread fact.
> sang a traditional Basque song called Hegoak (The Wings)
Note the name of the poem and later popular song is "Txoria txori"[1] (the bird is bird), which was written by Joxan Artze. The most well-known sung version is by Mikel Laboa[2].
Small correction: Hungarian, Finnish, Estonian and the Sámi languages of the very North are also not Indo-European, but Uralic languages. Not isolates though.
On being against the govt, technically the Basque and Navarrese "Fueros" (some kind of agreement between the people and the King) made them mostly self-managed in Spain/Iberia. There even used to be locally minted coins, customs and exeption from doing the military service.
And, on txokos, been there. They are often half-familiar/half-your-engraved-by-fire-friend-group-from-Elementary School times, forever and ever, amen.