Linguists may have the best answer, although they seem to have no accepted answers, just an array of competing theories.
basque's language is unique, an isolate, not connected to any other language. It is the only European language that predates the Romance or Indo-European languages.
Some try to connect it with various other languages, far from Basque, but not convincingly, to most linquists.
But how would this unique language explain where most of Europe originated? It may just be a tiny group of immigrants who remained isolated, explaining only that small immigrant group and none other.
Finland has a similar situation. Soumi is different from other European languages. Closest or perhaps the only close cousins are Hungarian, Estonian and far western Russia, adjoining Finland. Whether you believe in Genesis or the standard Darwinian evolution, both refer to an Eve, from whom all are descended. The secular evolutionists posit an African Eve. Either way, at one time that original small human group all spoke the same language, then as people migrated, languages evolved, to the point nearly unrecognizable by others. Some migrated into fairly isolated places, such as Basque or Finland.
It might be more productive to focus on the majority of languages and connect them backwards. Looking at Basque or Finland, at best explains just a lonely journey of a small group of migrants.
There is a Russian linguist, who compiled the Tower of Babel, (an unfortunate name as it put off secular people who thought he might be promoting Genesis). He knew more languages than any linguist ever. He made all the connections between languages and proto-languages, which tell an underlying story of immigration. He died almost unnoticed. Still, he collected the most massive data base of languages. He got nearly every language and dialect, except a few Native American Indian languages, where secular linguists had warned the locals to avoid talking to him.
His name: (drum roll) Georgiy Sergeevich or known as "George" Starostin
see another website eh.edu/engines/epi989htm an article by John H. Liehard
we once all spoke one language, trace the languages back to one original language.
they did DNA analysis of Basque speakers. same thing occurred. they are biologically "isolates" too, unlike those around them or seemingly anywhere. People evolve like languages evolve.
Starostin continued his father's work in linguistics and comparative languages. George was more fluent in multiple languages than anyone. He could also read Any language with the help of a dictionary. He knew grammar, verb tenses, and every aspect of language in 6,000 world languages. His publicly available searchable "Tower of Babel" data set should be the starting point of research into where did the Europeans come from.
