The Old Testament was written almost entirely in Hebrew. There are some passages of the book of Daniel which are written in Aramaic. This is because Daniel was in Babylon at the time, and that was the language of the Babylonian Empire. There are also a few words of Parsee, the language of Persia at the time in the book of Daniel.
Jewish or Hebrew I guess.
It's Hebrew which is a language similar to other languages of the region.
It was written in Latin
Most of the old testament was originally written by a language of HEBREW...
Hebrew I think, but some scholars somewhere think that it may have been written in Mesopotamia. I have no idea what that is!