Answer:
Yes and no, because there would be less people and they wouldn't want to fight because they have to rely on each other for survival. They would fight harder for their survival but not with each other in my opinion.
Explanation:
Languages are taught to you as you grow up. Language typically does not come naturally because if a kid had no outside influences the kid wouldn't be able to learn a language. Basically no standard english does not come to naturally as a child.