SEOUL – Kakao Talk, the free mobile phone text service that has exploded in popularity here, has reshaped the way Koreans communicate worldwide. It has even had an impact on the language and expression, with KFL, or Kakao as a Foreign Language. Available since summer for the iPhone, Android and Blackberry cell phones, Kakao, or KaTalk for short, has been downloaded by tens of millions of users. Based in Korea, it is growing worldwide, and it is now available in Japanese and English…….