Like the other English courses on Duolingo, this course teaches American English, although it will be effective in any English-speaking country. 
Starting in March 2014, releasing in BETA in June 2014 and today, March 14th 2015, the course is finally graduated to phase 3. This success cannot be made without the great effort of Trang., pmyt, br13lle and hami1804.
Many contributors have come and left ...
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