linguistic:translation, structural:expansion
Southern and Northern Sumerian

Bram Jagersma and Gábor Zólyomi distinguish two regional dialects of Sumerian: the Southern Sumerian dialect of Lagash, Umma, Ur and Uruk, which eventually formed the basis for the common standard of the Neo-Sumerian (Ur III) period, and the Northern Sumerian dialect as seen in texts from Nippur, Adab, Isin and Shuruppak (although eventually texts in the standard variety begin to be produced in that area as well). The differences that he finds between the two varieties are: