Gods or aliens

             Gods or aliens

I want to say that we are just biological experiment or endangered species. Which were populated on earth for increasing it's population. Why ?

1: In whole milky-way galaxy only earth has living life forms as till I know now inspite of having many suns and many planets. 

              Even in our solar system only our planet has living life forms and other planets looks like failed experiments. 

2: Different languages

Who taught us  how to speak certain language ? 

Like animals are also living beings and each species speak only one language but in human specie. Why too many different languages ? And also why speaking accent is different ?

Maybe the species who had taught us how to speak certain language is their language and we are speaking alien languages. Maybe we are just pawns, just like in ludo who acts according to user.