The Klingon alphabet was proposed but rejected. Subscript letters were proposed as well: http://www.unicode.org/L2/L2011/11208-n4068.pdf http://www.unicode.org

The Klingon alphabet was proposed but rejected. Subscript letters were proposed as well: http://www.unicode.org/L2/L2011/11208-n4068.pdf http://www.unicode.org/L2/L2011/11208-n4068.pdf but apparently "Not accepted: Because this has been controversial and is not directly related to repertoire under ballot, it is not appropriate to add it to Amd1 but may be considered for a future amendment" http://www.unicode.org/L2/L2012/12130-n4239.pdf http://www.unicode.org/L2/L2012/12130-n4239.pdf Looks like here's a recent draft for a new proposal: https://github.com/stevengj/subsuper-proposal https://github.com/stevengj/subsuper-proposal