Answer:
I can help u out in the comments but imma need a lil bit more to go off of.
This is true. Most European languages sprang from Proto-indo-european. Only a few languages such as Basque have unknown origin that have nothing to do with Proto-Indo-European languages.
A. It enables the audience to connect with the story teller (and, in my opinion, the story itself).
Where is the rest of the questions?