Answer:
Tok Pisin a native language of Papa New Guinea, an isolated country.
Hiri Motu a second native language of Papa New Guinea, an isolated country.
Explanation:
Isolated languages can persist over time due to the lack of outside influence of other languages that allow for the morphing of language from its roots in its origin.
They increased their sizes to rejuvenate the land. Before the war, everyone left their farms to go to the war. And once the war was over, the farms increased in size due to the high demand of resources needed to recover from the war.