Why do we call Allah instead of that in Shanghai dialect? I live in Songjiang. We always talk about it.

This is caused by historical reasons. Shanghai's opening 1842, with the influx of a large number of migrants, Shanghai has gradually become a mixed immigrant city. "There is no city without peace". Among the immigrant groups in Shanghai, Ningbo has the largest number of people. By the end of the Qing Dynasty, there were 400,000 Ningbo people living in Shanghai, accounting for about one-third of the total number of Shanghai residents at that time. Almost all Ningbo people were able to climb up to their relatives in Shanghai in a tortuous way. Such a huge immigrant group will undoubtedly have a great influence on the development of Shanghai dialect, and many words in modern Shanghai dialect are derived from Ningbo dialect, the most typical of which is "Allah".