I would really love to learn this language eventually, but I was just curious. How difficult do you think it is for a native english speaker to learn? Grammar, pronunciation, talking speed, and dialects all taken into consideration?
I agree BayernMunichTran, pronunciation is the most difficult, at least, for me. I can recognize some words when i'm watched a video in Vietnamese, but i can't seem to mimic the tones.
I find the grammar fairly easy, and I've heard that most Vietnamese (Central, southern, etc) can understand the Northern Dialect, which is what Duolingo teaches.
I would still recommend Vietnamese though, who knows? You may love it even with its difficulties! :)