関連ワード:  how long does it take to become fluent in german    how long does it take to become fluent in german as an english speaker    how long does it take to be fluent in german on duolingo    how long does it take to learn in german    how long does it take to learn fluent german    how long does it take to learn german in duolingo    how long does it take to learn b1 in german    how long does it take to learn b2 in german    how long does it take to learn german a1    how long does it take to learn german c1  
結果 : how long does it take to become fluent in german