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Portuguese to Spanish speech translation API

Stream Portuguese (Português) speech and get Spanish (Español) back in real time. One WebSocket, ISO codes pt to es, and ultra-low latency for voice agents and live apps.

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Production-ready Portuguese to Spanish translation API

Real Portuguese speech includes accents, regional dialects, code switching, and domain-specific vocabulary. Soniox recognizes it in a single model and streams Spanish while the speaker is still talking.

Portuguese and Spanish both belong to the Indo-European > Romance > Western Romance family, so cognates and shared structure carry over cleanly into the translated Spanish output.

Soniox preserves formatting in the translated transcript, including names, numbers, addresses, IDs, and domain-specific terms.

A breakthrough in real-time Portuguese to Spanish translation

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Translate before the sentence ends

Spanish meaning lands as Portuguese is spoken, not after the caption catches up.

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Directional pt to es streaming

Set the source and target codes once. Both arrive in a single labeled token stream.

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High quality Spanish output

Same model across every language, including historically underserved ones.

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Native-speaker Portuguese STT accuracy

Accurate Spanish translation starts with accurate Portuguese recognition across accents and language switching.

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Names, numbers, and domain terms

Preserved across the pair, including phone numbers, emails, and IDs.

config.json
{
  "model": "stt-rt-v4",
  "translation": {
    "type": "one_way",
    "source_language": "pt",
    "target_language": "es"
  }
}

Portuguese and Spanish through a single stream

Portuguese to Spanish translation is built on top of Soniox Speech-to-Text API. Every spoken word is transcribed, and Spanish translation streams mid-sentence in the same labeled token stream.

Turn it on by adding a translation block with source_language: "pt" and target_language: "es". It runs on the same WebSocket and the same model, with no extra round trip.

Live Portuguese to Spanish: written and spoken

Portuguese to Spanish speech-to-text

micLive Portuguese speecharrow_right_altsubjectSpanish text

Translate live Portuguese into written Spanish with the Soniox STT API. Soniox streams the Portuguese transcript and the Spanish translation as speech happens.

Use it for Spanish captions, subtitles, meeting translation, agent assist, and multilingual transcription.

Portuguese to Spanish speech-to-speech

micLive Portuguese speecharrow_right_altvolume_upSpoken Spanish

Build full spoken Portuguese to Spanish translation by combining Soniox STT and Soniox TTS. Soniox recognizes Portuguese, translates it, and speaks Spanish with low latency.

Use it for live interpreters, bilingual voice agents, travel assistants, and customer support.

Live Portuguese to Spanish translation in action

Stream Portuguese to Spanish one-way to push all speech into Spanish, or two-way to keep a bilingual conversation flowing between the two languages.

voice_selection
Portuguese speaker says: “Hoje estou em home office.”
translate
Translated into Spanish in real time.

One-way translation

Translate live Portuguese into Spanish. Everyone in the conversation sees the same translated stream.

Ideal for live captions, multilingual meetings, broadcasts, lectures, and customer calls.

voice_selection
Portuguese speaker talks in Portuguese.
hearing
Spanish speaker hears Spanish.
voice_selection
Spanish speaker replies in Spanish.
hearing
Portuguese speaker hears Portuguese.

Two-way translation

Translate between Portuguese and Spanish 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 Portuguese at 4.8% word error rate and Spanish at 5.3% word error rate. Accurate recognition on both sides is what makes the translation reliable.

speech_to_text

Speech-to-Text

Native-speaker accuracy across 60+ languages, with support for multilingual speech, alphanumerics, speaker diarization, context.

translate

Translation

Real-time streaming translation across 3,600 language pairs, built for high quality and low delay across all supported languages.

text_to_speech

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.

quiz
About Portuguese and Spanish

Portuguese has roughly 280,000,000 speakers across Brazil, Portugal, Angola, and Mozambique. Spanish has roughly 500,000,000 speakers across Spain, Mexico, Colombia, and Argentina.

Portuguese is the most spoken language in the Southern Hemisphere.

Spanish is the second most spoken language in the world by native speakers, after Mandarin Chinese.

Portuguese and Spanish are closely related languages, which helps Soniox keep tone and meaning consistent across the pair.

Translate Portuguese to any language

From Portuguese to Spanish, or Portuguese to any of 60+ supported languages. All real-time.

AfrikaansAlbanianArabicAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanChineseCroatianCzechDanishDutchEnglishEstonianFinnishFrenchGalicianGermanGreekGujaratiHebrewHindiHungarianIndonesianItalianJapaneseKannadaKazakhKoreanLatvianLithuanianMacedonianMalayMalayalamMarathiNorwegianPersianPolishPunjabiRomanianRussianSerbianSlovakSlovenianSpanishSwahiliSwedishTagalogTamilTeluguThaiTurkishUkrainianUrduVietnameseWelsh

Related translation pages

swap_horizTranslate Spanish to Portuguesearrow_right_alttranslatePortuguese speech translationarrow_right_alttranslateSpanish speech translationarrow_right_altarrow_right_altPortuguese to Galicianarrow_right_altarrow_right_altPortuguese to Frencharrow_right_altarrow_right_altPortuguese to Italianarrow_right_alt

Frequently asked questions

How do I translate Portuguese to Spanish with the API?arrow_downward
Add a translation block to your real-time request with source_language "pt" and target_language "es". Soniox transcribes Portuguese and streams the Spanish translation over the same WebSocket.
Is Portuguese to Spanish translation real-time?arrow_downward
Yes. Soniox streams Spanish while Portuguese is still being spoken, so meaning arrives mid-sentence instead of after the sentence ends.
What about translating Spanish to Portuguese?arrow_downward
That direction is supported too. See the Spanish to Portuguese page, or use two-way translation to run both directions in one session.
Portuguese and Spanish are both Indo-European > Romance > Western Romance — does that affect quality?arrow_downward
Shared family structure and cognates generally help. Soniox uses the same model for every pair, so quality stays consistent whether the languages are closely related or not.
Does Soniox handle Portuguese dialects and accents?arrow_downward
Yes. Soniox handles Portuguese dialects like Brazilian Portuguese, European Portuguese, and African Portuguese in a single model, so Spanish translation stays accurate across regions.
Which other providers support Portuguese to Spanish?arrow_downward
Based on their public docs, OpenAI, Google, Azure, and Speechmatics list both Portuguese and Spanish for real-time translation. Soniox is the only one that also supports two-way live translation across 60+ languages.
How fast is Portuguese to Spanish translation?arrow_downward
Soniox streams Spanish as Portuguese is being spoken, with ultra-low latency. Translation arrives before the sentence ends.

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