by Paul Schmiedge (Developer) on March 31, 2012 · permalink

"Programme" is considered a secondary spelling - many of those words were excluded from the list simply to save space. I'll get it added to the next version.

In Canadian English, however, "-ise" is considered incorrect. Only a handful of words are exceptions to that general rule:

http://www.termiumplus.gc.ca/tcdnstyl-chap?lang=eng&lettr=chapsect3&info0=3.16