There's a translation of the NES game Super Monkey Daibouken around that's never made it to the site. The CRC32 is 99b0f136; it's gone around under the name "Super Monkey Adventure". No idea how complete it is.
There are also tons of commercial or semi-commercial indie translations that haven't made it here, like various MSX translations, an alternate translation of Ninja Princess for SG-1000 that was ported to the ColecoVision (and I'm sure it's much better than my very crude effort!), etc.
This is all assuming that your thread is targeted at games that were translated, but don't have patches or translation pages on RHDN. If you're aiming at something else, my apologies.