In his lifetime J.R.R. Tolkien never ceased to experiment on his constructed languages, and they were subjected to many revisions. They had many grammars with substantial differences between different stages of development. After the publication of The Lord of the Rings (1954–1955), the grammar rules of his major Elvish languages Quenya, Telerin and Sindarin went through very few changes (this is late Elvish 1954–1973).
In his lifetime JRR Tolkien never ceased to experiment on his constructed languages and they were subjected to many revisions They had many grammars with substantial differences between different stages of development After the publication of The Lord of the Rings (1954–1955) the grammar rules of his major Elvish languages Quenya Telerin and Sindarin went through very few changes (this is late Elvish 1954–1973)