The purpose of williams's a key into the language of america was

to provide information about native american beliefs

to provide a dictionary of the native american language

to provide a guide for fishing with native american tools

to provide reasons to go to war with the native americans

The purpose of Williams's A Key into the Language of America was to provide a dictionary of the Native American language.

Explanation:

A Key into the Language of America, published in 1643, had as its main objective to establish the most common phrases used by Narragansett Indians.

According to Williams, the key to getting to know America better and achieving its success was to talk to those who had originally lived there.

Williams was a great defender of Native Americans and had great talent for languages. He believed in equal rights for the natives and thought that no one should take away their land, which caused him to be banished from Massachusetts Bay.

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