When you hear people in the real estate industry talk about which franchises are “taking over the world,” they usually don’t mean that phrase literally, but in the case of Keller Williams, it might just be appropriate. Keller Williams, one of the fastest-growing franchise groups in the country, announced its expansion to five new countries at its Mega Camp event today: Israel, Nicaragua, France, Monaco and Poland. According to a company release, Keller Williams now has 2,921 international agents (outside the U.S. and Canada) across 31 countries and regions. In 2016, the company has grown its overseas real estate agent base by 810 net agents — that’s an increase of more than 38 percent year-over-year. “In 2016, we have continued our historic rate of growth internationally, ad…