33 Contact and North American Languages

Languages indigenous to the Americas offer some good opportunities for inves-tigating effects of contact in shaping grammar. Well over 2000 languages are known to have been spoken at the time of first contacts with Europeans. They are not a monolithic group: they fall into nearly 200 distinct genetic units. Yet against this backdrop of genetic diversity, waves of typological similarities suggest pervasive, longstanding multilingualism. Of particular interest are similarities of a type that might seem unborrowable, patterns of abstract structure without shared substance. The Americas do show the kinds of contact effects common elsewhere in the world. There are some strong linguistic areas, on the Northwest Coast, in California