I'm not sure if this is established, but my take on the whole wolf-sendings is that they are giving out an image, not a word. Or, maybe they do send out a word since the wolves are also descendants of Timmain. But since they are mostly wolf, they are only able to give out a word, or again, an image.
I don't think the elves speak English. I'm sure they have their own language but doubt WaRP wanted to create the language and then expect us to learn it. Having it translated to English is fine by me.