Hi there,

I'm afraid we've had to remove this question, as it's far too broad to facilitate an answer of the quality which we'd expect on /r/AskHistorians. If you have a specific question regarding the development of the German language, we'd encourage you to ask that - unfortunately it's simply not feasible to provide a meaningful summary of the development of the entirety of modern German.

I'd recommend narrowing your question down to a discussion of a time and region - such as the languages spoken in post-Roman-Germania in Early Medieval Europe.

Thanks for your understanding!