How to translate a lecture live on your phone

By Spoken · September 23, 2026

When a lecturer is already on the next point, stopping to translate a sentence means falling further behind. Live lecture translation lets you follow the speech as it happens, in a language you can read comfortably.

Live translation or transcription: which do you need?

These solve different problems. Translated captions help you understand a speaker using another language. Same-language captions help you read along, catch unfamiliar names, or keep a transcript for later. Decide which matters most before the talk starts.

For example, if a lecture is in Spanish and you want to follow it in English, use Listen with Spanish as the source and English as the target. If you understand Spanish but want a written record, use Captions in Spanish. These are separate session modes, so choose your workflow before recording.

Set up live lecture translation in Spoken

1. Choose Listen. Set the source language to the lecturer’s language and the target to the language you want to read.
2. Check your audio pickup. Place your phone where the speaker is clearly audible. A brief test before the lecture is more useful than discovering halfway through that nearby conversation is louder than the lecturer.
3. Start the session. Read the translated captions as the talk progresses. If you want audio playback, connect headphones and follow the app’s audio controls (see how to hear live translation in your own headphones).
4. Adjust the text to suit you. Pinch the transcript with two fingers to enlarge or reduce the text while reading.
5. Stop when the talk ends. Review what you heard while the context is still fresh.

Follow a full-length lecture

Spoken supports continuous two-hour sessions without manual restarts, useful for lectures, workshops and extended talks. A long session still needs enough phone battery and, for online translation, a reliable connection. Full use requires a subscription.

Simultaneous translation means the translation develops during the talk. It does not mean that every word arrives at exactly the same instant as the original: recognition and translation introduce a short delay. Read complete phrases, especially when the source and target languages use different word orders.

Save captions and turn them into study notes

If a saved original-language transcript is your priority, start a Captions session. Spoken saves the raw captions to History. Open that saved session and choose AI enhancement when you want a formatted transcript, summary and key points. You can then translate the AI summary layer into another language.

AI enhancement is a Pro feature and needs internet access. It runs when you request it; stopping a session does not automatically create notes. The original transcript stays available. For a related workflow, read how to turn a meeting transcript into notes.

Get clearer captions in a real lecture room

• Prioritize the speaker’s voice. Move closer when possible and avoid covering the microphone.
• Check technical terms. Names, equations and specialist vocabulary deserve a second look against the lecture slides.
• Keep the room quiet. Use headphones for translated audio so playback does not disturb other listeners.
• Check recording expectations. Follow the lecturer’s and venue’s rules before saving a session.

Which languages work?

Spoken supports the same 60+ languages for online speech recognition and natural voice output, including English, Spanish, Japanese, Korean, French, Arabic and Turkish. That coverage matches Soniox’s speech-recognition and voice-output language lists. Offline packs have separate device and language requirements; check your pair in the app before relying on offline use.