How did the differences between the eastern and western portions of the Roman Empire arise?

Some main differences between the Eastern and Western Roman empires are that the main language of the Eastern Roman Empire was Greek, while the language of the Western Roman Empire was Latin, and that the Eastern Roman Empire was more cosmopolitan.

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Economic success prussia had a very strong economy, partly due to the success of the zollverein. stronger prussian army king wilhelm wanted to build a bigger, stronger army but was blocked by the prussian landtag (parliament).-credits to google for putting answer -credits to slideshare for making answer-credits to me for putting answer on brain.ly