I believe the existence or lack of indigenous languages neither do related to our interactions nor our comfortable relations. Since our communication area are spirited from each other, People have to know a common language to interact with the other nations, and prefer using their native language to contact with their peer and their families.
.... this section does not convey your idea clearly. I cannot really get what you try to mean :(
I hope you re-phrase that part to improve clarity of your ideas. Also, make sure you have a specific example to support that reason. Examples help you convince the reader on your position in the argument.
The growth of native language campaigns to defend the native language rights around the worth shows how people interested in protecting their native language.
.... this too is very confusing to understand :( .... First try with simple sentence structure, one idea per one sentence.