My Greek Civ. Professor finally solved the issue that had taxed me for a long time.....Why are animal's named so rough while their meat is named very stylish.
Here is an example.

No one says, I'll have a pig...they say pork
No one says I'll have a swine...they say ham.
Similarly people call cow..beef
deer...veal
lamb..mutton.

Well, that is because German is a low level language while french is a hig class language.
All the farmers and meat herders spoke german, while meat eaters spoke french.

Therefore it was in the evolution of the Indo-Europeans that the language classification was formed.