Bold entries are available for Lab 15-208, Bill Heinz, and include signup codes
Spanish - http://duolingo.com/o/gektcr
Greek
Chinese - http://duolingo.com/o/qdypjx
Vietnamese - http://duolingo.com/o/dfwnvk
Italian
Arabic - http://duolingo.com/o/pevsdk
Czech
Indonesian
Russian - http://duolingo.com/o/vhdguf
Portuguese
Turkish
Dutch
Romanian - http://duolingo.com/o/kzdpru
Polish
French - http://duolingo.com/o/znfprv
German
Hungarian
Hindi - https://www.duolingo.com/o/pkmjzz
Japanese
Korean
Ukrainian
If your student’s first language is not listed here, duolingo is not a good option for them.