Bound translateable element attributes

Working example here:
http://emberjs.jsbin.com/dopoz/2/edit

Using "data-bindtranslateattr-xxx" as to not confilct with regular bound attributes.
Agree that it seems nonsensical.
It is supported, ember just looks up the string as if it was a key. Not sure if it's deprecated yet but I think it's going away in the future.