Technically they are folivores because they specialize in leaf eating. But they are also commonly called omnivores. They are fascinating. We have one at the zoo in the tropical room and we love observing it as it oh so slowly moves. I have seen one in the wild in Costa Rica. Really a thrill.
Aren't they funny when they poop (like once month).? I saw a documentary all about sloths and they poop real slowly , of course, and kind of stare off into the distance with this goofy grin on their face.