I never heard in England to talk about the "fraternal peoples": the British, Scots, Welsh and Irish. And in France, Spain, Italy do not talk about the "fraternal Romanesque peoples." Sprinking a neighboring blood is, please: the British - Irish and mutually, the French are Spanish and mutually, but no one begs for the brothers. It seems that only among the Slavs, and even then not everyone, the interethnic metaphors "brother", "fraternal", "brother" do not go out of fashion.