Wharton- chances of admission

I understand you are applying for the Moelis program?
Deferred MBA programs look for applicants with leadership potential in addition to the grades. While getting into an exclusive undergrad points to your academic capabilities and the GPA demonstrates it, your work profile and leadership positions on campus also have an equal role to play in strengthening your candidature. You haven't covered those enough in your message. So if you were to apply this application cycle, do leverage these to show a well-rounded personality.
Wharton is a very international focused MBA program- one of the 2-3 top most in US programs, so your international exposure and focus will really count. I like it that you are doing an internship abroad. IMO that's an excellent exposure starting early in your career.
Being able to speak 4 languages and having 3 nationalities- makes you sound well travelled. This is interesting if you can fall back on your experiences in different countries/ cultures, how they have shaped your personality/ value system and how they will make you a more valuable contributor to the Wharton MBA class. Your academic course in international relations can further add to this theme.

I would say, take the GMAT and go ahead and apply. You have nothing to lose.