While they did have their own distinct dialect and vocabulary, it was still English. They were, after all, English people who had emigrated to the New World.
Here are some things that make their language unique:
* Religious vocabulary: They used many words and phrases related to their strict religious beliefs, such as "grace," "election," and "redemption."
* Biblical references: Their speech was heavily influenced by the Bible, which they read and studied extensively.
* Simple and direct style: They valued plainness and clarity in language, avoiding flowery prose and complex grammatical structures.
Although they spoke English, their dialect and vocabulary might sound different to modern ears. You can find examples of their language in their writings, sermons, and other historical documents.