The language of the Elves of Beleriand in Tolkien’s Middle Period (1930-1950 in the terminology of this lexicon). In The Etymologies from the 1930s, Tolkien described several dialects of this language, including the main Ilkorin language (Ilk.), Doriathrin (Dor.) and Falathrin (Fal.). This lexicon groups them all together under Ilkorin/Doriathrin. Tolkien also sometimes labeled these languages Beleriandic (Bel.), especially in later writings (e.g. PE18/103-4). When Tolkien rearranged his linguistic history so that Sindarin became language of the Elves of Beleriand, he abandoned Ilkorin, though some aspects of the language may have survived in North Sindarin.