Question 1

What is 语言 OS (Language OS)?

Accepted Answer

语言 OS (Language OS) is a Chinese vocabulary learning app for web and desktop. You collect the Chinese words you run into, look them up in the built-in Chinese–English dictionary with pinyin, and review them as spaced-repetition flashcards until they stick. Your deck and progress stay in sync across every device.

Question 2

What is spaced repetition, and why does it work for learning Chinese?

Accepted Answer

Spaced repetition is a review technique that shows you each flashcard right before you would forget it, with intervals that grow every time you answer correctly. Because reviews land at the moment of near-forgetting, you spend far less time than with fixed daily drills and remember far more — which matters for Chinese, where thousands of words and characters need to become long-term memory.

Question 3

Is 语言 OS free to use?

Accepted Answer

Yes. 语言 OS is free to start: create an account, look up words in the built-in dictionary, and review your daily flashcards at no cost. There is nothing to install for the web app and no deck setup required.

Question 4

How is 语言 OS different from Anki or Pleco?

Accepted Answer

Anki is a general-purpose flashcard app that leaves dictionary lookup and deck design to you; Pleco is a superb phone dictionary that isn't built around long-term review on desktop. 语言 OS combines the two ideas: a built-in Chinese–English dictionary and a purpose-built spaced-repetition engine in one place, so a word goes from lookup to scheduled review in one tap — on the web and desktop, with one synced deck.

Question 5

Do I need to know any Chinese to start?

Accepted Answer

No. 语言 OS works at any level. Beginners can start from suggested high-frequency words, and advanced learners can capture vocabulary from articles, the web, or daily life. The app suggests the most useful words you don't know yet, so there is always something worth learning next.

Question 6

Which platforms does 语言 OS run on?

Accepted Answer

语言 OS runs in any modern browser and as a desktop app. A reader for articles and stories, a browser extension for pop-up lookups, and a mobile app with an OCR camera for capturing real-world Chinese are on the roadmap — all feeding the same synced deck.