When did Valmiki write Ramayan?

[paul linus]

In the 5th century BCE. Ramayana is an ancient Indian epic book about exile of Rama, Sita and Lakshmana for 14 years and their return back after a war with Ravana in Lanka.

 

[Nil Thapliyal]

In which language originally Valmiki wrote the Ramayana. Was it in Sanskrit or some other language.