[At least there's enough familiar words in that second sentence for it to register in Glorfindel's mind as Westron. But why? You'd think if anything after a strike to the head the elf would return to Sindarin. There are other things to worry about right now, though. Like Legolas' apparent confusion.

That must have been some hit.]

Rivendell. Estel - Aragorn - brought you here. [He switches to Westron to match him, to see if that makes things easier.] You should return to bed until Elrond has a chance to look at you.