主持人
你学中文多久了？
One vocabulary system across native content
Track the Chinese words you meet in real content
Rolko keeps useful Chinese vocabulary from supported subtitles, webpages, transcripts, and pasted text in one system. Mark words as learning or learned, see how much of a text you know, and review saved vocabulary with spaced repetition instead of rebuilding a disconnected list for every video or website.
Start learning
The web app works in every modern browser. No extension required.
Interactive product proof
See vocabulary coverage change as you learn
This interactive transcript uses Rolko’s real vocabulary states and shared word-coverage calculation.
Reading workspace
学中文的秘诀
Tap or hover a word for its pronunciation and meaning. Mark it as learned or learning.
Word Coverage
Learned: 50%Learning: 20%New: 30%
嘉宾
大概三年了，但是每天都要练习。
主持人
有什么好的学习方法吗？
嘉宾
我觉得看中文剧最有用，边看边学。
Rolko-specific evidence
What this workflow actually supports
Last verified . Checked against Rolko’s current browser-capability gate, Chrome extension manifest 0.2.17, public routes, and shared interactive product demos.
| Surface | Current support | Important limitation |
|---|---|---|
| Desktop browser extension | Supported desktop Chromium-family browsers | The install path is not offered to Safari, Firefox, Android, or iOS. Website access is requested from a user action. |
| Mobile web app | Reading, vocabulary, and review | The watch-page and webpage-hover browser-extension workflows are desktop-only. |
| YouTube | Interactive subtitles and supported transcript import | Requires usable captions in the active study language; not every video exposes a supported transcript. |
| Netflix | Interactive subtitles on supported watch pages | Requires usable subtitles in the active study language; title and page-state support can vary. |
| Normal webpages | Selectable Chinese text | Image, canvas, protected, or unusually structured text may not be available. Rolko does not provide OCR. |
| Transcript import | Supported sources in the Rolko web app | Requires a source and transcript that Rolko can retrieve or accept. |
Worked example: from 学习 in a transcript to scheduled review
The transcript demo above uses Rolko’s shared vocabulary states and coverage calculation, so the example remains inspectable in the page HTML and UI.
Encounter the word in a line
Read “有什么好的学习方法吗？” in the interactive transcript and open 学习 in context.
Inspect and classify it
Review the pinyin and meaning, then keep the existing state or mark the word Learning or Learned.
See the coverage state change
The shared transcript coverage calculation updates from the same vocabulary state rather than a separate marketing-only counter.
Review saved vocabulary
Words kept for learning can enter Rolko’s spaced-repetition review flow alongside vocabulary from other supported surfaces.
Product workflow
Keep continuity across every learning surface
One saved vocabulary
Keep words from supported video subtitles, webpages, transcripts, and pasted text together.
Learning and learned states
Record what you are actively learning and what you already know instead of starting from zero.
Coverage and review
Use vocabulary states to understand text coverage and revisit saved words with spaced repetition.
Continue in Rolko
Turn encountered words into scheduled review
Words saved from native content can enter Rolko’s spaced-repetition review flow and remain connected to your vocabulary progress.
Review
Vocab Review
加油
今天的比赛很重要，大家一起加油吧！
Related Rolko answers
Continue with the workflow you need
What is Rolko, and when should you use it?
Rolko is a language-learning web app and browser extension for interactive subtitles, webpage text, vocabulary tracking and spaced-repetition review.
A focused Language Reactor alternative for learning Chinese
Looking for a Language Reactor alternative focused on Chinese? Use Rolko to explore Chinese subtitles, save useful words and review them with spaced repetition.
Learn Chinese with Netflix subtitles
Learn Chinese with supported Netflix subtitles on desktop. Explore words for pinyin and meaning, save vocabulary and review it later with Rolko.
Learn Chinese with YouTube subtitles
Learn Chinese with supported YouTube subtitles. Explore words on desktop or import an available Chinese transcript into the Rolko web app.
A Chinese popup dictionary that also remembers your words
Use Rolko to explore normal Chinese webpage text for pinyin and meaning, save useful words and keep them in one vocabulary and review workflow.
How to understand Chinese characters in videos
Learn when Rolko can make Chinese subtitles or transcripts interactive and when Chinese text baked into video pixels requires a separate OCR tool.
Common questions
What to know before you start
Can I import Chinese words I already know?
Yes. Rolko supports importing existing vocabulary so experienced learners do not have to rebuild their known-word list one word at a time.
Can one list include words from videos and websites?
Yes. Supported subtitle, webpage, transcript, and text-reading flows use the same Rolko vocabulary system after sign-in.
What is the difference between learning and learned?
Learning marks vocabulary you are actively working on. Learned records vocabulary you already know while keeping it available for progress and review logic.
Does Rolko use spaced repetition?
Yes. Saved vocabulary can enter Rolko’s spaced-repetition review workflow.
Can vocabulary coverage prove that I understand a text?
No. Word coverage is a vocabulary estimate, not a guarantee of comprehension. Grammar, context, names, and segmentation also affect understanding.