What language did Jesus really speak during his ministry?
It's very important to know that the Hebrew and Greek letters that were found, are only translations that were written 150 to 300 years after Jesus. It is important to know that Jesus did not speak Greek. So therefore, the Greek letters are nothing but a translation (which could have many faults in it) from Aramaic to Greek. Same applies to Hebrew. When you translate a doctrine that was written hundreds of years after the fact into another language, then you can't really claim that your sources are 100% correct. As a matter of a fact, claiming 50% would be even too much.
Aramaic Language, Semitic language closely related to Hebrew. Originally the language
of the Aramaeans (see Aram), it was used, in many dialectical forms, in Mesopotamia and
Syria before 1000BC and later became the lingua franca of the Middle East (see
Assyro-Babylonian Language). Aramaic survived the fall of Nineveh (612BC) and Babylon
(539BC) and remained the official language of the Persian Empire (539-337BC). Ancient
inscriptions in Aramaic have been found over a vast area extending from Egypt to China.
Before the Christian era, Aramaic had become the language of the Jews in Palestine. Jesus
preached in Aramaic, and parts of the Old Testament and much of the rabbinical literature
were written in that language. Christian Aramaic, usually called Syriac, also developed an
extensive literature, especially from the 4th to 7th centuries.
Aramaic began to decline in the 7th century AD. Aramaic survives today in Eastern and
Western dialects, mostly as the language of Christians living in a few scattered
communities in Syria, Lebanon, Turkey, Iraq, and Iran.
(From Encarta Encyclopedia )
Please visit: History of man's corruption in the Bible. See why the current first bibles conflict with each others.