(from 2012). I would not have understood his Spanish either...
explaining the video: Stallman throws a fit at Brasilean kids that overestimated their English comprehension skills. But I doubt the alternative, doing the speech in Spanish (and not Portuguese), would deliver better results. Stallman is left with no viable options in his mind... smoke comes out of his ears.
For example, did you know that ZIM on Pandora can display some unicode? The site has updated their index it to the 2018-6 version of Unicode (of course, the new symbols like bitcoin do not print on Pandora) http://xahlee.info/comp/unicode_index.html