Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
As far as I can tell they use the standard Roku keyboard. Use the "!?#$%&" button to get to special characters. If you don't see the one you're looking for press the * button on your remote and you should see another set of characters.