Summary

Portrait of Franz Boas Franz Boas International Journal of American Linguistics…

It may be observed in all parts of America that the native languages are being modified by the influence of European languages, not only in vocabulary, but also in phonetics and grammar. The far-reaching influence of these causes may be observed in a most striking manner in modern Mexican and other Central American languages, that have been under Spanish influence for centuries, and which not only have lost large parts of their vocabularies, that have disappeared with the ancient ideas, but which have also developed a new syntax, and, in part at least, new morphological forms.
Source: Wikisource

Portrait of Franz Boas Franz Boas International Journal of American Linguistics…

It is certainly desirable, and necessary, to investigate minutely and carefully all suggestive analogies. The proof of genetic relationship, however, can be considered as given, only when the number of unexplained distinct elements is not over-large, and when the contradictory classifications, to which reference has been made before, have been satisfactorily accounted for. It is quite evident, that, owing to the lack of knowledge of the historical development of American languages, convincing proof of genealogical relationship may be impossible to obtain, even where such relation exists
Source: Wikisource

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