By the early half of the 20th century, modern scholars reached a nearly unanimous opinion that Aramaic became a spoken language in the land of Israel by the start of Israel's Hellenistic Period in the 4th century BCE, and thus Hebrew ceased to function as a spoken language around the same time. However, during the latter half of the 20th century, accumulating archaeological evidence and especially linguistic analysis of the Dead Sea Scrolls has qualified the previous consensus. Alongside Aramaic, Hebrew also flourished as a living spoken language. Hebrew flourished until near the end of the Roman Period, when it continued on as a literary language by the Byzantine Period in the 4th century CE.
The exact roles of Aramaic and Hebrew remain hotly debated. A trilingual scenario has been proposed for the land of Israel. Hebrew functioned as the local mother tongue, Aramaic functioned as the international language with the rest of the Mideast, and eventually Greek functioned as another international language with the eastern areas of the Roman Empire. Communities of Jews (and non-Jews) are known, who immigrated to Judea from these other lands and continued to speak Aramaic or Greek.Free Quote
Although the survival of Hebrew as a spoken language until the Byzantine Period is well-known among Hebrew linguists, there remains a lag in awareness among some historians who do not necessarily keep up-to-speed with linguistic research and rely on outdated scholarship. Nevertheless, current understandings of the vigor of Hebrew are slowly but surely making their way through the academic literature. The Hebrew of the Dead Sea Scrolls distinguishes the Dead Sea Scroll Hebrew from the various dialects of Biblical Hebrew out of which it evolved: "This book presents the specific features of DSS Hebrew, emphasizing deviations from classical BH." The Oxford Dictionary of the Christian Church which once said, in 1958 in its first edition, that Hebrew "ceased to be a spoken language around the fourth century BCE", now says, in 1997 in its third edition, that Hebrew "continued to be used as a spoken and written language in the New Testament period". An Introductory Grammar of Rabbinic Hebrew says, "It is generally believed that the Dead Sea Scrolls, specifically the Copper Scroll and also the Bar Kokhba letters, have furnished clear evidence of the popular character of MH [Mishnaic Hebrew]." And so on. Israeli scholars now tend to take it for granted that Hebrew as a spoken language is a feature of Judea's Roman Period.