/lit/ - Literature

Does anyone have any advise or resources I can use to help out my linguistics in my fictional setting? I'm writing a fantasy medieval world but I want the names to capture the cultures I'm going for. To start, I need to research the etymology of names and words. Since i'm basing my book off the 14th and 15th century mostly inspired by England and France and western Europe, I will be looking to Old Norse , old German, and celtic for migrating tribes. I need an understanding of Old English ,Old Norman, and Old French. This will be the basis of naming my cultures and kingdoms. However I need some guidance on rules and such with some inspiration. Any advice?

Also what is the best way to distinguish language barrier within prose? For example, a confusion between say middle english and french english (norman) and francien dialect that became the standard in France later on?