yes my Vietnamese gf says ok you can do duolingo if it is fun for you but to speak the language you need to learn useful conversation. The problem is that without duolingo I don't learn anything and she still doesn't help me at all. But of course she wants constant help with English. Why is that?
I agree with Trett. "Put the milk back in the fridge." "Close the refrigerator door." The whole purpose of learning a foreign language is to be able to use it in conversations. I will NEVER go to VietNam and say to anyone, "I am a refrigerator!" (They would cart me away and put me in an insane asylum!)