A Key into the Language of America, also known as An help to the Language of the Natives in that part of America called New England, is a detailed colonial study of the native languages and dialects of the Native American tribes in New England in the 17th century. It mainly focused on the Algonquian and the Narragansett languages. This book is widely believed to be responsible for making American Indian languages more accessible and introducing some words into the English language.