|Looks like someone put more effort into a header than I did.|
I originally came across this blog while searching for Powerwolf lyrics. I ended up searching for all the other bands I know use Latin lyrics. Markheim translates and tries to provide context to all the lyrics he finds. It's an insightful look at a language not many of us understand and it helps understand the songs from your favourite bands just a little bit more.
Best of all, he's been posting semi-regularly since 2008. That's more than you can say about the blog you're reading this on. So check out Heavy Latin and see if there are any songs you're curious about. If not, you can always send Markheim a request for all the songs you want.
You can find Heavy Latin at http://heavylatin.blogspot.com or by searching "Heavy Latin" on Google.
P.S. Completely unrelated to the subgenre of Latin metal which I didn't even realize was a thing.