The /sr chat command followed by a skill ring's name is meant to swap rings to the ring typed out in the command. However, it only seems to read the first word of the ring name (since in JP there weren't any spaces in ring names), which causes the command to fail. As far as I can tell there isn't any way to input this command and make it work, at least while the language is set to english.

Edit: Oh, someone told me that no spaces doesn't work, but it 100% does. Well that was easy.