The majority of the Old Testament was originally written in which language?

Ian, nobody cares about dead sea scrolls. Why do you drag J C. into this. Mixing and mingling seeds.

Ian, Daniel and Ezra were written in Aramaic. Most of the OT was written in Classical Hebrew. They are related languages, but Hebrew was more widely spoken. Some people are confused because JC spoke Aramaic, the language of the people where and when he lived. He would also have known Classical Hebrew, but not his everyday language.

this answer is actually factually incorrect. the old testament was actually originally written in Aramaic just like the dead sea scrolls