so, if I understand well, possibly a pre-I-E old european (mesolithic? older?) language, after that technical terms from Eastern Mediterranea (Levant) send there by the elite that accultured Atlantic coastal populations? just before the I-Eans arriving?
Why not? Some say (it's debated) that iberian language was a mixture of an undetermined non-I-E element, an basco-aquitan non I-E element, and some celtic loans... Some others note common terms in basque, sardignan substrate and other mediterranean coastal languages (albanian too, I believe) - maybe not so old as the basis of proto-basque but later the words send there by this supposed maritime elite I was speaking about?
good night (it 's good for the brain work)