:::::The relevant WP policy is to put the IPA notation after the article title.  I'm sure no one would say Boo if you added a note about his name frequently being mispronounced, but there really is no way for a native english speaker with no knowledge of spanish to properly pronounce his name.  The 'ch' sound in south american spanish is a slightly different voiceless postalveolar affricate than in english.  The inflection is also very different.  As said above, Americans don't pronounce Paris Paree... and neither do the French.  It's pronounced with an uvular trill.