Iskramor
Dumbfuck!
Most European myths and legends are very similar,you may recognize some them as part of your culture the same way i recognize most of them as part of my culture. It is really hard to find the actual roots of some myths and legends. There are similar legends through out the world. Vampires are met in every culture around the world. In the Europa they come from Bulgaria.It's interesting why he'd use a Gaelic "traditional" song (I looked it up and I was right, the song was written by Sìne NicFhionnlaigh in the 18th century) for a game/setting based on Polish myths.
Because the setting at its foundation is actually based on traditional western mythos and stories, and it was only awkwardly peppered on top with Slavic references to give it that exotic vibe.
Myths are often similar, correct, but the culture is not. And it just so happens that Witcher draws heavily from tales and legends that are uniquely tied to western culture, tales that have already existed at a time when Slavs were still living on trees.
It's a credit to Sapkowski's skill as a writer that his setting still seems coherent to people, despite the fact that it's actually a poorly put together, random mix of Tolkien's fantasy and western mythos, peppered with Slavic terminology and barely holding together with bandaids and duct tape.
Witcher is just plagiarsm from elric of melnibone