Basque as an (imperfect) window into the past

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Today is International Day of the Basque Language, which we celebrate at Lingoblog with an article by Iván Igartua.

Being a language isolate in Europe is a strenuous condition, often fraught with vicissitudes. There are over 150 genetically isolated languages in the world (for which no relatives have been found thus far), but I would venture that none of them has inspired so many hypotheses of all sorts about its remote origin and possible genetic connections as the Basque language. Albeit thoroughly unconvincingly, Basque has been alternately related to Etruscan, Burushaski, Pictish, Chinese, the Celtic group of Indo-European languages, the Berber and Caucasian languages, the Na-Dene linguistic phylum, or the Uralic and Paleo-Siberian languages, among many others. Some otherwise serious …