Answer:
Their language, now called Old English, originated as a group of Anglo-Frisian dialects which were spoken, at least by the settlers, in England and southern and eastern Scotland in the early Middle Ages, displacing the Celtic languages (and, possibly, British Latin) that had previously been dominant.
Explanation:
The bc an is plural meaning there is more than one and you just got 1 of many and a sounds wrong so "The" is the answer
I dont really understand your question but i would say yes, you may have less work to do