[CHOMAT]

No serious study can claim that Euskara is an isolate language. That's nearly a linguistic contradiction. It is because many linguists have failed ( up to now)to find out real links that makes them put forth the proposition Euskara is an isolate language.
Some colleagues in linguistics- Basque speakers and conversant with its diachronic and synchronic structures , which is not the case of many linguists, - conducted an investigation into several languages families ( Caucasian, Ural-Altaïc- American Indian tongues and so forth ) . They compared lexicon, pronouns, declension, myths and find out various similarities with some of the studied languages. Without going further into details, the authors came to terms with the fact
-that there are obvious links between Euskara and some Asian languages,

that these languages shared a long time ago the same linguistic 'route'
Their hypothesis is also backed up by genetics ( blood groups.) and physiology together with anthropology. Consequently, they have proved Euskara keeps old bonds with other families and can't be regarded as isolated.