I can only speak sensibly about Bilbo, having been there. Spanish is spoken there everywhere, but Basque will be received best by those whose speak it - all school kids learn it, for instance, but it is not a majority language there, as far as I know. I recommend visiting Donostia (San Sebastian), very pretty!
Thanks for the sound advice, @Aran & @Louis.
I’ll get stuck in to Level 1 and (apart from the September Bootcamp) put Welsh on the back burner for a bit.
Gracias yn fawr iawn
Ooh, if you’re coming to September bootcamp we’ll have to find an opportunity to step out of hearing range from the other bootcampers and try out some Spanish