English to Finnish speech translation API
Stream English (English) speech and get Finnish (Suomi) back in real time. One WebSocket, ISO codes en to fi, and ultra-low latency for voice agents and live apps.
Trusted by teams building global voice products
Production-ready English to Finnish translation API
Real English speech includes accents, regional dialects, code switching, and domain-specific vocabulary. Soniox recognizes it in a single model and streams Finnish while the speaker is still talking.
English (Indo-European > Germanic > West Germanic) and Finnish (Uralic > Finnic) come from different language families, so word order and morphology differ. Soniox reorders meaning in-stream instead of word by word.
Soniox preserves formatting in the translated transcript, including names, numbers, addresses, IDs, and domain-specific terms.
A breakthrough in real-time English to Finnish translation
Translate before the sentence ends
Finnish meaning lands as English is spoken, not after the caption catches up.
Directional en to fi streaming
Set the source and target codes once. Both arrive in a single labeled token stream.
High quality Finnish output
Same model across every language, including historically underserved ones.
Native-speaker English STT accuracy
Accurate Finnish translation starts with accurate English recognition across accents and language switching.
Names, numbers, and domain terms
Preserved across the pair, including phone numbers, emails, and IDs.
{
"model": "stt-rt-v5",
"translation": {
"type": "one_way",
"source_language": "en",
"target_language": "fi"
}
}English and Finnish through a single stream
English to Finnish translation is built on top of Soniox Speech-to-Text API. Every spoken word is transcribed, and Finnish translation streams mid-sentence in the same labeled token stream.
Turn it on by adding a translation block with source_language: "en" and target_language: "fi". It runs on the same WebSocket and the same model, with no extra round trip.
Live English to Finnish: written and spoken
English to Finnish speech-to-text
Translate live English into written Finnish with the Soniox STT API. Soniox streams the English transcript and the Finnish translation as speech happens.
Use it for Finnish captions, subtitles, meeting translation, agent assist, and multilingual transcription.
English to Finnish speech-to-speech
Build full spoken English to Finnish translation by combining Soniox STT and Soniox TTS. Soniox recognizes English, translates it, and speaks Finnish with low latency.
Use it for live interpreters, bilingual voice agents, travel assistants, and customer support.
Live English to Finnish translation in action
Stream English to Finnish one-way to push all speech into Finnish, or two-way to keep a bilingual conversation flowing between the two languages.
One-way translation
Translate live English into Finnish. Everyone in the conversation sees the same translated stream.
Ideal for live captions, multilingual meetings, broadcasts, lectures, and customer calls.
Two-way translation
Translate between English and Finnish for live bilingual conversation. Each side speaks naturally and hears the other in their own language.
Soniox supports real-time two-way translation between any two of 60+ supported languages.
Accurate on both ends of the pair
Soniox transcribes English at 1.25% word error rate and Finnish at 1.25% word error rate. Accurate recognition on both sides is what makes the translation reliable.
Speech-to-Text
Native-speaker accuracy across 60+ languages, with support for multilingual speech, alphanumerics, speaker diarization, context.
Translation
Real-time streaming translation across 3,600 language pairs, built for high quality and low delay across all supported languages.
Text-to-speech
High-fidelity speech generation in 60+ languages, built for names, alphanumerics, language switching, and ultra-low-latency streaming.
Together, they create a complete real-time low-latency speech AI platform.
About English and Finnish
English has roughly 1,500,000,000 speakers across United States, United Kingdom, Canada, and Australia. Finnish has roughly 5,500,000 speakers across Finland.
English is the most widely spoken language in the world when including both native and non-native speakers.
Finnish is not related to the neighboring Scandinavian languages; it belongs to the Uralic family.
Soniox makes English to Finnish usable in real-time translation across every supported pair.
Translate English to any language
From English to Finnish, or English to any of 60+ supported languages. All real-time.
Frequently asked questions
How do I translate English to Finnish with the API?
Is English to Finnish translation real-time?
What about translating Finnish to English?
Does Soniox handle English dialects and accents?
Which other providers support English to Finnish?
How fast is English to Finnish translation?
Simple, usage-based pricing
Translate live audio from English to Finnish from ~$0.18/hour.
Translation is already built into Soniox Speech-to-Text API. When turned on, it adds about ~$0.06/hour in output token costs.
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