Question:  who speaks the language which is theThe First Grammatical Treatiseis a 12th-century work on its phonology
Sentence (from "First Grammatical Treatise"): The First Grammatical Treatise (Icelandic: "Fyrsta málfræðiritgerðin" ) is a 12th-century work on the phonology of the Old Norse or Old Icelandic language.
Relevant evidence: Yes