Complex sentence: The Elves even derived some loanwords from the Valar's language, which was called Valarin in Quenya, although these were more numerous in the Vanyarin dialect than in Noldorin, probably because of the enduringly close relationship the Vanyarin Elves had with the Valar.
Split into simpler sentences: The Elves even derived some loanwords from the Valar's language, which was called Valarin in Quenya, although these were more numerous in the Vanyarin dialect than in Noldorin. This was probably because of the enduringly close relationship the Vanyarin Elves had with the Valar.