I'm invited to Adventure League. AL has strict rules on character and lore setting.
I greatly enjoy Faerûn of Forgotten Realms, as I read Avatar Series, First 4 books of Drizzt Do'Urden, reading Dragonlance now.
I'm also DM on personal campaigns, but don't run currently Faerûn campaigns.
I did some research, tried many searching variations but couldn't find any lore wise guidelines of similar atmosphere like Vikings, Norse lifestyle or Celtic lifestyle. There are obvious gods like Talos who mimics Perun or Thor if you wish and an even plane of Ysgard (Gladsheim), which is some kind representation of Valhalla (The Heroic Domains).
Considering many monsters, societies and their resemblance to many our world cultures, it is kinda strange, that I can't google it right to find a place in Forgotten Realm material plane, where people live by Norse or Celtic customs.
My question is - is there any information about people of Faerûn lore of such "theme"? Do they exist at all, I mean, if there's no Norse/Celtic styled communities in Faerûn, is there any closest ones? If there are such settings, where I can find/read/learn about them?