Add messaging and multi-language support to 'Superlist' Wordpress theme, create "I'm Attending" function/sections for Events

I am using the 'Superlist' WordPress theme. I would like to integrate it with a plugin that lets people message each other (maybe BuddyPress?), as well as with WPML (WordPress Multi Language) or another Multi Language plugin so that I can provide the site in multiple languages and translate different posts easily. You do not need to do any translating yourself, just enable the website to support multi-language. I also want to create an "I'm Attending" button and sections for Events. The button will let people indicate that they are attending the event, and adds them to a "People Attending This Event" section of the event, as well as creating a new "My Events" section in a person's profile (similar to [login to view URL] ). I am hoping to get done ASAP, so if you are available type ASAP in your bid. Please don't waste my time with "placeholder" bids, ONLY BID YOUR FINAL BID AFTER REVIEWING THE PROJECT REQUIREMENTS, AND FEEL FREE TO ASK QUESTIONS.