translate sentence feature added 📝, with example

[elmanna]

Hi Demian Volkov,

Recently i have started a small project which it need to translate sentences & words, i had no issues with words translation, but sentences i just didn't know how to do it, when i put a long sentence to try to translate it, it just returns an empty string, so i just played around & added a sentence translation function along with an example for it.

hope you accept the pull request, Peace ✌️

Elmana,