The Old Testament was written over a period of several centuries, and it's no surprise that different languages were used during that time. I mean, think about it, languages evolve, and new ones emerge, just like how Latin influenced many European languages. The use of different languages in the Old Testament is like a reflection of the cultural and historical context of the time.
For example, the Book of Daniel has parts written in Aramaic, while the rest of it is in Hebrew. It's like how we might switch between languages or dialects depending on the situation or audience, and it's cool to see that ancient writers did the same. The use of Aramaic in the Old Testament is also a testament to the cultural exchange and influence of the ancient Near East.