How long Does it Take to Become Proficient? http://www.languagetesting.com/how-long-does-it-take https://www.languagetesting.com/how-long-does-it-take languagetesting.com How long Does it Take to Become Proficient http://www.languagetesting.com/how-long-does-it-take 480 hours A study done by Language Testing International 480 hours