Free Forever
Access all grammar guides, quizzes, and flashcards without paying a cent. Quality education should be accessible to everyone.
Listen to pronunciation
Example
這項新政策實施後，申請人數在三年內倍增。
这项新政策实施后，申请人数在三年内倍增。
After this new policy was implemented, the number of applicants grew severalfold within three years.
Usage Notes
Describes an amount or number growing to several times its former level, rather than merely increasing a little.
Sottaku
About Sottaku
Sottaku is an app for learning a growing range of Asian and European languages with a strong focus on SRS. It includes automatic flashcard creation for hundreds of thousands of words, grammar breakdowns in example sentences, language-specific study packs where available, adaptive quizzes, mobile apps, a browser extension, and community features. Give it a try now! All learning content is free with no limits on flashcards or study time.
Sottaku is built to match the habits of successful learners. By using Sottaku, you will naturally learn in the most efficient way possible, as proven by countless success stories in the language learning community.
Smart SRS System
Our flashcard system uses the FSRS algorithm (also used in Anki) to optimize your review schedule and maximize retention.
Comprehensive Content
From hanzi, kana, hangul, and European vocabulary basics to grammar and reading practice where available, we have lessons for every level. Practice with quizzes tailored to your skill.
Community Chat
Ask level-appropriate questions and get help from the community. Learn together with fellow learners across every supported language.