[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] ''substitucion'', from Middle French, from Late Latin ''substitution''-, ''substitutio'', from ''substituere'' | [https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] ''substitucion'', from Middle French, from Late Latin ''substitution''-, ''substitutio'', from ''substituere'' |