americans come

Is Duolingo a joke in U.S.? I was talking to an american on Tandem I asked him where did he learned Portuguese and if it was on Duolingo, the guy sounded so offended like I offended the eighth generation of his family.

sort of? and it should be a joke anywhere, its not great for learning a language

No or at least I wasn't aware it was. I like Duolingo

i getting good at french with nice green birdie that i like :)

i like duolingo ^_^

learning a second language in America is a joke

Youre in America, speak American

Duolingo is generally known as something helpful to prepare for visiting a country, but not ACTUALLY learning the language.

its alright (i have a 682 day streak please help)

Duolingo is generally considered not the greatest tool for learning languages. (mostly just helps with some vocabulary), so asking if he used duolingo probably made him assume that you were implying his sentence structure and vocabulary were basic/starter level

i know it's pointless and you don't mean anything by asking if he used duolingo, but the more polite way to inquire about it in American culture would be to say something like "how did you learn the language?" instead. That way they won't assume you're judging their proficiency

Best way to learn a Language is going to party, no better way to speak a language than trying to talk with a pretty woman theres no better motivation.

You'll notice that the way it teaches you is incredibly inefficient. Instead of learning grammar rules, you just learn different conjugations of verbs as a new vocab word. It's a fun game, but not a good way to learn a language. If someone's really serious about learning a language, my advice would be to take classes at school, or buy a textbook.

the world would be a better place if there was a true universal language

Duolingo is amazing, I used it for 5 days and now I can order rice and water at a Japanese restaurant.