Babbel
Self-study course appsStructured courses with speech recognition and AI conversation practice
- Format
- Self-study app (structured courses)
- Free option
- First lesson of every course
Alternative to Duolingo, Rosetta Stone

Fill-in-the-blank sentences in 50+ languages, free to play
Last verified:
Clozemaster has thousands of fill-in-the-blank sentences to build vocabulary in context. It covers 50+ languages and 170+ language pairings, and is free to play.
| Available on | iOS, Android, Web |
|---|---|
| Format | Sentence practice game |
| Languages (app’s claim) | 50+ (170+ pairings) |
| Free option | Free to play |
Sources: clozemaster.com, checked 22 Oct 2026. “Available on” is from this listing. Blank means we haven't found it in official docs yet, not that it's unsupported.
Structured courses with speech recognition and AI conversation practice
Alternative to Duolingo, Rosetta Stone
Course app with a free tier and Premium plans
Five-minute visual vocabulary games in 55+ languages
Alternative to Duolingo
Chat with native speakers learning your language
Learn from reading and listening to real content in 53 languages
AI-paced vocabulary course, about 10 minutes a day