Do not insert LANGUAGE for ATTENDEE-s
Per https://tools.ietf.org/html/rfc5545#section-3.8.4.1 LANGUAGE attached to ATTENDEE is the language used to interpret the CN= property-parameter. Evolution always inserts LANGUAGE=EN, but it does not know in which language the parameter shall be interpreted, since it has no information about this. In particular, LANGUAGE=EN is inserted by Evolution, even when CN does not contain latin characters.
- Do not insert LANGUAGE for ATTENDEES in iCalendar objects.
Edited by Milan Crha