Language Spoken to the People

The people of Israel, also called the children of Abraham, spoke in Hebrew one to another.  The five books of Moses are written in Hebrew.  When God addressed Moses, he spoke in Hebrew.  The words that God spoke were written in Hebrew.  No other language was involved in recording the biblical account.  Only the Book of Daniel is not in Hebrew but in Aramaic, a language that is closely related to Hebrew.

1 The LORD called Moses and spoke to him from the tent of meeting, saying,
2 “Speak to the people of Israel and say to them, When any one of you brings an offering to the LORD, you shall bring your offering of livestock from the herd or from the flock. 

13 But the LORD spoke to Moses and Aaron and gave them a charge about the people of Israel and about Pharaoh king of Egypt: to bring the people of Israel out of the land of Egypt.

89 And when Moses went into the tent of meeting to speak with the LORD, he heard the voice speaking to him from above the mercy seat that was on the ark of the testimony, from between the two cherubim; and it spoke to him.

25 Then the LORD came down in the cloud and spoke to him, and took some of the Spirit that was on him and put it on the seventy elders. And as soon as the Spirit rested on them, they prophesied . . .

Speaking was in Hebrew

God speaks to Moses from the tent of appointed meeting
God speaks to Moses and Aaron together
God speaks to Moses from above the mercy seat, the ark
God speaks to Moses and then to the seventy elders by his Spirit