Reisesprachführer
Euvit, s.r.o.
Rosetta Stone:学习语言
Rosetta Stone Ltd
GetYourGuide:门票和观光旅行
GetYourGuide
Urlaubsguru - Reisen & Urlaub
Urlaubsguru GmbH
博树 Busuu —日语、英语与多国语言学习神器
Busuu
Pimsleur: Language Learning
Simon & Schuster
Lingvano: Sign Language - ASL
Lingvano
DuoCards - Vocabulary Builder
DuoCards
Drops点滴学语言 - 用单词卡玩着学英语日语韩语粤语
Drops Languages