Hi, this is not a translation issue, but I reported a month ago to Office Insider and to Feedback Hub, and want to make some attention to this.
When a user sends in Outlook 2016 (C2R) meeting invitation with text inside it in the Czech language with characters like "ščřžýáé" the invite is stored in calendar OK. But when the first user responds and accepts the meeting, the text in invite gets broken. The characters changed to different Unicode characters.