Viki retired its built-in Learn Mode feature, which used to provide dual subtitles on select titles. To get dual subtitles with dictionary lookups on Viki now, you need a browser extension — and LangPanda is the mainstream subtitle-learning tool that officially supports Viki. Language Reactor and Trancy don't cover it.
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What happened to Learn Mode.
Viki's Learn Mode — the built-in feature that showed two subtitle tracks with clickable words on selected shows — has been discontinued by Viki (their support center confirms the sunsetting). It was many K-drama learners' first taste of subtitle-based study, and its retirement left Viki, home of one of the largest K-drama and C-drama catalogs anywhere, without a native learning feature.
The replacement: a browser extension.
Extensions rebuilt this functionality — and went further than Learn Mode ever did. But platform support is the catch: most subtitle tools never covered Viki. Language Reactor is Netflix + YouTube. Trancy covers seven-plus platforms, but Viki isn't among them. **LangPanda is the mainstream tool that officially supports Viki** — dual subtitles, click-any-word dictionary (with real Korean and Mandarin dictionaries, not just translation), and one-click flashcard capture with the audio and screenshot from the scene. For Korean it's a genuinely strong pairing: Viki's catalog plus a dictionary that handles conjugated forms.
Setting it up
is the standard extension flow: install in Chrome, Brave, or Edge, open Viki in the browser (not the app — extensions can't touch mobile/TV apps), and the subtitle toolkit activates in the player. LangPanda's 7-day trial covers Viki, so you can verify it on your show before paying anything.
If you won't use an extension:
your options are watching on Netflix instead, where free-tier tools (Language Reactor, Trancy) operate — Netflix carries a meaningful K-drama slice, though far less than Viki — or Lingopie's curated catalog, which includes Korean but is its own library. For most Viki loyalists, the extension is the answer.