Could someone translate this poem for me?

[Galin]

Also, especially for such a long request (relative to a name or a short phrase) even someone very familiar with Quenya will arguably be giving his or her opinion of a translation in Neo-Quenya. Below is a citation from...

http://www.elvish.org/FAQ.html

(...) This is not to say that it is impossible or meaningless to compose sentences that so far as anyone now can tell conform to the exemplars and statements that Tolkien did make to a very high degree (for example, by relying only upon attested elements and derivational mechanisms, attested grammatical devices, and attested syntactic patterns that can reasonably be thought to belong to the same conceptual phase), but that is a far cry from being able to speak these languages, and cannot even justify a claim of "authenticity", since for any but the most trivial compositions it will remain exceedingly unlikely that Tolkien himself would have produced or countenanced the result himself.'

Ardalambion is mentioned in the full FAQ, which I highly recommend reading ( though maybe you're already aware of these distinctions, I don't know).