Can you translate phone calls in real time? Yes — here's how

Yes — you can translate a phone call in real time. Each person speaks their own language, and within about a second the other side hears a faithful translation. With voice cloning, they hear it in a voice that resembles the original speaker, so the call still feels personal rather than robotic.

How real-time call translation works

A live translated call streams every sentence through three stages — speech recognition, machine translation, and speech synthesis — without waiting for you to finish talking. Recognition emits words as you say them, translation begins before the sentence ends, and the translated audio starts playing as soon as the first words are ready. The result is a continuous conversation rather than a stop-and-wait exchange.

• You speak normally — no need to pause after every sentence.
• The other side hears the translation with sub-second added latency.
• Both directions are translated at once, so it works for a genuine back-and-forth.
• Voice cloning keeps each speaker's tone, so the call feels human.

Does it work over a normal phone line?

It does. Telephony audio is narrowband and noisy compared with a studio microphone, so the speech recognition has to be tuned for it. SimulSpeak handles both web (WebRTC) calls and ordinary phone (SIP/PSTN) calls, and primes the recogniser for telephony conditions so accuracy holds up on a real call.

How much does it cost?

A human phone interpreter typically costs €60–120 per hour and has to be booked in advance, one language at a time. Real-time AI translation is available on demand, 24/7, across 24 languages, for a flat monthly price — which for most businesses is a fraction of the per-call cost of an interpreter.

When is it the right tool?

Real-time call translation shines for sales calls into new markets, supporting customers in their own language, coordinating a multilingual workforce, and any conversation that simply could not happen before because of the language barrier. For legal or medical situations that demand a certified human interpreter, AI translation is best used as a fast first line rather than a replacement.

Want to try it? Start a translated call in minutes and hear the difference latency makes.