This is the complete list of the languages of Beleriand, except for the minor ones. Here I tried to collect all available info on all the languages of Middle-earth, their origins etc. Try the hyperlinks to explore the following:

The Cirth1 The Cirth2	Adunaik	Entspeech	Pre-elvish	Telerin	The Tengwar1 The Tengwar2
	Avarin	Ilkorin	Quenya	Valarin
	The Black Speech	Khuzdul	Sindarin	Westron
	Eldarin	Nandorin	Talisca	Minor Languages
	Other Language Material Useful Elvish Phrases