This question concerns the Land of Israel circa 1,500-1,000 BCE.
Different sources mention different languages for this region:
This land was part of the New Kingdom of Egypt, so presumably Middle Egyptian and Late Egyptian would have been spoken (?)
Biblical Hebrew starts at the end of this period but should probably be included. I gather it was probably similar to Ugaritic.
The Armana Letters were in Akkadian.
I am by no means an expert, so I don't expect the above to be complete or accurate :-/
I expect colloqual languages and administrative/diplomatic languages would have been different, so the question I have is: which language(s) would ordinary citizens have spoken?
Would it have been normal to speak more than one language? And would this answer be consistent across the land, or would there be a geographic difference?