How to say how long in English?
How to say how long ("wie lange") in German?
How to say how long ("combien de temps") in French?
How to say how long ("どのぐらいの間") in Japanese?
How to say how long ("per quanto") in Italian?
How to say how long ("多久") in Chinese?
How to say how long ("얼마나 오래") in Korean?