Tiếng Việt

tbd…

+ memrise?
+ https://123vietnamese.com/lesson-1-hello/

pronounciation
+ http://www.learnvietnamesedaily.com/vietnamese-pronunciation-guide-vowels-diphthongs/
+ http://www.learnvietnamesedaily.com/tones-in-vietnamese-the-basic-guide/

1. Study for 1100 hours.