猜测1：宝钻“辛达”一章中提到，Daeron devised Runes,and the Naugrim that came to Thingol,learned them,and were well-pleased with the device.By the Naugrim the Cirth(the Runes) were taken east over the mountains and passed into the knowledge of many peoples. 大意是双树时期，戴隆发明了如尼文。矮人学习了这种文字并十分喜爱，他们把它带到了大山（应该是Ered Luin蓝山）东面，进入（译得不好）了许多人的知识中。
……这样的话，矮人使用的如尼文很可能就是戴隆在上古时期发明的那种如尼文Cirth或是它的演化体。那么称其为古精灵语应该也不能算错。
猜测2：地图上的如尼文与古精灵语毫无关系，纯属翻译错误。
本人更偏向第一种猜测。。。。