But your assumption has no basis in scripture. On what do you base your speculation? Do you doubt that the Creator has the ability to inspire humans to write down what he wanted on record? He did not dictate the scriptures word for word, but inspired the writers to record the events in their own words. In the four gospel accounts each included details that the others omit. Put them all together and you have one story.
So what language was used? Was Hebrew still spoken?
"The strongest evidence...favoring the view that Hebrew continued as a living language down into the first century of the Common Era is found in the references to the Hebrew language in the Christian Greek Scriptures. (
Joh 5:2;19:13, 17, 20; 20:16; Re 9:11; 16:16) While many scholars hold that the term “Hebrew” in these references should instead read “Aramaic,” there is good reason to believe that the term actually applies to the Hebrew language...
When the physician Luke says that Paul spoke to the people of Jerusalem in “the Hebrew language,” it seems unlikely that he meant thereby the Aramaic or Syrian language. (
Ac 21:40;22:2; compare
26:14.) Since the Hebrew Scriptures earlier distinguished between Aramaic(Syrian) and “the Jews’ language” (
2Ki 18:26) and since the first-century Jewish historian Josephus, considering this passage of the Bible, speaks of “Aramaic” and “Hebrew” as distinct tongues (
Jewish Antiquities, X, 8 [i, 2]), there seems to be no reason for the writers of the Christian Greek Scriptures to have said “Hebrew” if they meant Aramaic or Syrian."
Hebrew, II — Watchtower ONLINE LIBRARY
"What language did Jesus speak? On this question there is considerable difference of opinion among scholars. However, concerning languages used in Palestine when Jesus Christ was on earth, Professor G. Ernest Wright states: “Various languages were undoubtedly to be heard on the streets of the major cities. Greek and Aramaic were evidently the common tongues, and most of the urban peoples could probably understand both even in such ‘modern’ or ‘western’ cities as Caesarea and Samaria where Greek was the more common. Roman soldiers and officials might be heard conversing in Latin, while orthodox Jews may well have spoken a late variety of Hebrew with one another, a language that we know to have been neither classical Hebrew nor Aramaic, despite its similarities to both.” Commenting further, on the language spoken by Jesus Christ, Professor Wright says: “The language spoken by Jesus has been much debated. We have no certain way of knowing whether he could speak Greek or Latin, but in his teaching ministry he regularly used either Aramaic or the highly Aramaized popular Hebrew. When Paul addressed the mob in the Temple, it is said that he spoke Hebrew (
Acts 21:40). Scholars generally have taken this to mean Aramaic, but it is quite possible that a popular Hebrew was then the common tongue among the Jews.”—
Biblical Archaeology, 1962, p. 243."
Aramaic — Watchtower ONLINE LIBRARY