Unfortunately we know less about them than we should like since they are kept mainly in charters, runic books, a few poems, and some interlinear translations of the Bible.

不幸的是，我们对它们的了解不如我们想要的多，因为它们主要只是存在于契约/宪章/公文、古北欧文书籍、几首诗和一些圣经的隔行穿插译本中。