What does cuantas veces vas a la biblioteca duranta semana mean in elgish?

The phrase "cuantas veces vas a la biblioteca duranta semana" is Spanish, not Elvish. It translates to "how many times do you go to the library during the week" in English.

There's no such thing as an "Elvish" language in the real world. If you're referring to the languages from Tolkien's works, you'd need to specify which one:

* Quenya: The "High-Elven" language of the Noldor.

* Sindarin: The "Grey-Elven" language spoken by the Sindar.

To get a translation, you'd need to specify which Elvish language you're interested in.