If you can find time to go over the huge database accumulated in the discussion boards of Jose Carillo’s English Forum during the past three years, you’d be able to come up with lots of interesting ideas for your undergraduate assignment. You’d find discussions of practically every aspect of English grammar and usage between members from various countries that use English as a first, second, or third language. Just make a short list of, say, four or five ideas from the discussions that catch your fancy and you’d be off to a good start with your forum.
Good luck!