The language of Yeshua was and remains Hebrew.
All of his ministery was in Hebrew. This has been proven beyopnd any shadow of doubt through the copies of Matthew’s gospel in the original language from St Petersburg, and from the various other Jewish archives in England and the caves of the Dead Sea.
Testimony from the disciples of John also bear this out.
Hebrew was the 'liturgical' language used in the Temple. The common parlance of the peoples in that region of the world was Aramaic. There are still a few towns where it is still spoken.
Aramaic is a Semitic language, related to Hebrew, Arabic, and similar languages. According to an expert linguist whom I consulted, Hebrew and Aramaic are related much as French and Spanish or Cantonese and Mandarin. During the time of the Assyrian Empire (8th century BC), Aramaic became used throughout the Ancient Near East as the language of diplomacy. In the time of the Persian Empire (6th-4th century BC), Aramaic was the predominant language of the region. Since Judea was part of the Persian Empire, Jews for whom Hebrew was a primary language began to speak Aramaic, especially those of the upper classes. By the time of Jesus, Aramaic was the most common language in Judea, though Hebrew may have been dominant in certain areas, such as Jerusalem or the Qumran community by the Dead Sea. Greek usage was also widespread in those regions during the first century A.D.The widespread use of Aramaic among Jews is illustrated by the fact that portions of the Old Testament are in Aramaic, not Hebrew (Ezra 4:8-6:18; 7:12-26; Daniel 2:4-7:28; Jeremiah 10:11). This means, for example, that one of the most important passages in the Old Testament for our understanding of Jesus appears in Aramaic. Daniel’s vision of “one like a son of man” is described in Aramaic (kebar ‘enash; 7:13). Moreover, around the time of Jesus, though probably after his death, the Hebrew scrolls of the Old Testament were translated into Aramaic for use in the synagogues, because so many Jews did not understand Hebrew.)
What Language Did Jesus Speak?
Aramaic Language: The Language of Christ
It is generally agreed that Jesus and his disciples primarily spoke Aramaic, the common language of Palestine in the first century AD, most likely a Galilean dialect distinguishable from that of Jerusalem. Language of Jesus