Do you agree? Vote plz.

1 how old is language
2 period between speaking -writing
3 what factor speed it up
4 what is easier make language or learn it.
5 single origins? Multiple ?
6 speed of spread
7 is ancient sounding language ancient
8 Is language prone to change? So why is sometime changing so little

1 ~15K
2 sometime >1000 Y
3 emigration, oppression economy.
4 learn
5 multiple?
6 fast
7 it is frozen

Is it logic in crating words? Reference plz .
First philosophers - what should be the words
Today philosophers – what words mean :)