What do they mean?I think it is Deutsch. My friend told me : "gute Nacht" ,"tschüss! " ,"Ich habe dich gern" .What do they mean?I think it is Deutsch.I never learn it before.

what should I do as a language partner?

I am a Chinese student and I want  to improve my English .But I don't know what to do as a language partner .So can you tell me what you are talking about with your language partner or how you help each other?

what's the meaning of this sentence? One men is an island. what's the meaning of this sentence?