Later , the original qeltu Baghdadi dialect became extinct as a result of massive Bedouin immigrations to Lower Mesopotamia and was replaced by the Bedouin influenced Gelet dialect .
The Mongol invasion wiped out most of the inhabitants of Mesopotamia .
Later , the original qeltu Baghdadi dialect became extinct as a result of massive Bedouin immigrations to Mesopotamia   and was replaced by the Bedouin influenced Gelet dialect .
The Mongol invasion wiped out most of the inhabitants of Mesopotamia .