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How to translate a conference or training session live for international attendees

By Ondřej Plevka, builder of LiveInterpret.AI. Last verified 2026-10-09.

Short answer: take one clean audio feed from the room's mixer or the speaker's microphone into a live translation service. Attendees scan a QR code and hear the session, with captions, in their own language on their own phone, with nothing to install. With LiveInterpret.AI a 2-hour session into two languages uses 240 language-minutes, covered by the €49 Event pack.

Disclosure: we build LiveInterpret.AI. Where another approach fits better, we say so below.

What you need

ItemDetail
Audio feedA clean line from the room's mixer or PA, or the presenter's microphone through a small mixer. A phone placed on the lectern works poorly: room echo and noise are what the translation hears.
A laptop or device on the venue networkIt sends the audio feed. Wired or strong Wi-Fi beats attendee Wi-Fi.
QR codeOn the opening slide, badges, a table card or a poster. Attendees scan, pick a language, listen. Unlimited attendees, no accounts.
EarbudsAttendees bring their own. Captions are there for anyone who prefers to read, and for noisy rooms.
One rehearsalPractice mode is free and unlimited, with synthetic translation, so whoever runs the room can test the whole chain at the sound check.

Step by step

  1. Choose languages. Ask registrants which language they want to listen in. Each language is metered separately.
  2. Sign up and rehearse. Create an event page and run practice mode with the room's real audio at the real venue.
  3. Show the QR code early: on the welcome slide and the registration desk, so attendees connect before the first talk.
  4. Start when the session starts and stop at breaks. Billing is connected time, so a rehearsal and a lunch break never cost minutes if you stop.
  5. Brief speakers to speak at a steady pace into the microphone and to say acronyms and names clearly.

What it costs

Short answer: usage is measured in language-minutes, one event minute in one language. A 2-hour session into two languages is 240 language-minutes. The €49 Event pack has 450, valid 12 months, and new accounts get 30 real minutes free. Attendee count never changes the price. Prices EUR, VAT included.

EventLanguage-minutesFits in
1-hour workshop, 1 language60Flex €19 (150 min)
2-hour training, 2 languages240Event €49 (450 min)
Half-day conference (4 h), 2 languages480Growth €129 (1,350 min)
Full day (8 h), 2 languages960Growth €129 (1,350 min)
Training company running sessions every weekvariesA subscription, from €49/mo (450 min)

For comparison, interpreter-headset rental typically runs €200–500 per event before the interpreter's fee.

Other ways to do it

ApproachGood forLimits
Human interpreters with booth and headsetsLarge formal conferences, negotiations, sensitive or highly interactive sessionsInterpreter fees per language, rental, receivers to hand out and collect
Meeting software with built-in translationFully online or hybrid sessions where everyone is logged inPeople in the room with only a phone have no way in; check each product's current language and licence limits
Event-translation platforms with sales-led pricingLarge, multi-track events that need a vendor and a production teamQuotes, minimum commitments and onboarding calls; confirm prices in writing
LiveInterpret.AISmall and mid events, trainings and workshops; audio and captions, nothing to installAI translation: quality varies by language pair; no enterprise integrations or SLA; rehearse technical terms

When a person is the better choice: if the content is legally or medically binding, or the session is mostly discussion between participants, hire an interpreter. AI interpretation helps attendees follow a talk; it is not a certified translation.

Organisers and AV companies

If you run events for clients, the same setup serves each one. Your name, logo and colors appear on the attendee page on every plan; a custom domain is a separate add-on. Start with one event as a trial.

FAQ

Do attendees need to install an app?

No. Attendees scan a QR code, pick a language and listen or read in their phone's browser, including with the phone locked. There is no account to create. Put the QR code on the screen, the badge or a table card.

How much does it cost to translate a conference or training session?

Usage is metered in language-minutes: one minute of the event in one target language. A 2-hour session into two languages is 240 language-minutes, which fits the €49 Event pack (450 minutes, valid 12 months). A full 8-hour day into two languages is 960, which fits the €129 Growth pack (1,350). New accounts also get 30 free real language-minutes. Prices are EUR, VAT included. Attendee count never changes the price.

What audio does it need?

One clean audio feed of the speaker: the room's mixer or PA output, or the presenter's microphone through a small mixer. Rehearse once at the venue; practice mode uses synthetic translation, is free and unlimited, and costs no minutes.

Can the sessions be run in parallel rooms?

Each room needs its own audio feed. Running several rooms at the same time is part of the Premium plan; confirm the current plan details before promising parallel tracks to a client.

Can it replace professional interpreters at a conference?

Not for every case. Human interpreters remain the quality benchmark and are the better choice for negotiations, legal or medical settings and highly interactive sessions. AI interpretation helps attendees follow a talk; quality varies by language pair, so test your pair and your technical terms before the day.

Can an event organiser or AV company put their own name on it?

Yes. Your name, logo and colors appear on the attendee page on every plan. A custom domain and full brand removal are a separate paid add-on.

Why not use the translation built into video-meeting software?

Meeting software serves people who are logged in to the meeting. Attendees sitting in a room with only their phones have no way into that session and no PA feed, so an in-room audience needs a separate path such as a QR code. If everyone is online, built-in tools may be all you need.

Try it free at your next event or training →

Author: Ondřej Plevka, builder of LiveInterpret.AI, which has run live weekly in a Prague congregation since June 2026. Corrections welcome.