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.

是，我们对它们了解如我们想要多，因为它们主要只是存在于契约/宪章/公文、古北欧文书、几首诗和一些圣隔行穿插译本中。