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Documentation Index

Fetch the complete documentation index at: https://developer.kallglot.com/llms.txt

Use this file to discover all available pages before exploring further.

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Supported Languages

Kallglot supports real-time voice translation across 29 languages. Kallglot abstracts:
  • Speech-to-Text (STT)
  • Real-time translation
  • Text-to-Speech (TTS)
into a single real-time API. No additional configuration is required.

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What “Supported” Means

All supported languages include:
  • Speech-to-Text (STT)
  • Real-time translation
  • Text-to-Speech (TTS)
All languages support bidirectional voice conversations. Latency may vary depending on language.

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Latency Overview

TierLanguagesEnd-to-End Latency
Real-Time16~1–1.5 seconds
Extended13~3–4 seconds
Latency may vary slightly depending on network conditions and call routing.

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Real-Time Languages

These languages are optimized for low-latency conversations (~1–1.5s).
LanguageCode
Englishen
Germande
Frenchfr
Spanishes
Italianit
Portuguesept
Dutchnl
Polishpl
Russianru
Japaneseja
Koreanko
Chinese (Mandarin)zh
Hindihi
Turkishtr
Vietnamesevi
Ukrainianuk

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Extended Languages

These languages are fully supported but may have higher latency (~3–4s).
LanguageCode
Arabicar
Swedishsv
Norwegianno
Danishda
Finnishfi
Greekel
Czechcs
Romanianro
Hungarianhu
Thaith
Indonesianid
Malayms
Hebrewhe

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Regional Variants

For improved transcription accuracy, you can specify regional variants using ISO language and country codes.
VariantCodeBase Language
Swiss Germande-CHGerman
Austrian Germande-ATGerman
Swiss Frenchfr-CHFrench
Canadian Frenchfr-CAFrench
Swiss Italianit-CHItalian
Brazilian Portuguesept-BRPortuguese
European Portuguesept-PTPortuguese
Latin American Spanishes-LASpanish
Castilian Spanishes-ESSpanish
British Englishen-GBEnglish
American Englishen-USEnglish
Australian Englishen-AUEnglish

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Using Regional Variants

{
  "mode": "bidirectional_translation",
  "source_language": "de-CH",
  "target_language": "fr-CH"
}
Kallglot automatically applies the appropriate models.

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Language Detection

Kallglot can automatically detect the spoken language: 
{
  "mode": "bidirectional_translation",
  "source_language": "auto",
  "target_language": "en"
}

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Notes

  • Initial detection may take 2–3 seconds
  • Works best when speakers use a single language
  • Accuracy improves with more audio

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Detected Language Event

When using auto-detection, you’ll receive a language_detected event via WebSocket: 
{
  "type": "language_detected",
  "speaker": "customer",
  "language": "de",
  "confidence": 0.94
}

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Translation Quality

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Highest Quality

  • English ↔ German
  • English ↔ French
  • English ↔ Spanish
  • English ↔ Italian
  • English ↔ Portuguese
  • English ↔ Dutch
  • English ↔ Japanese
  • English ↔ Chinese
  • German ↔ French
  • Spanish ↔ Portuguese

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High Quality

All combinations between:
  • English, German, French, Spanish, Italian, Portuguese, Dutch, Polish, Russian

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Standard

All other supported combinations are handled automatically.

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Voice Options

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Custom Voices (Kallglot Managed)

Kallglot supports custom voice deployment for enterprise and B2B use cases. This allows you to:
  • Use a branded voice
  • Maintain a consistent voice across calls
  • Deploy voice identity across languages
Available as part of Kallglot-managed deployments.

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Standard Voices

Kallglot uses high-quality neural voices optimized for:
  • Low latency
  • Clarity in phone calls
  • Natural conversational tone
Voice selection is handled automatically or can be configured via the API.

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Using a Voice

{
  "mode": "ai_agent",
  "source_language": "en",
  "target_language": "es",
  "voice": {
    "voice_id": "your_voice_id"
  }
}
If no voice is provided, Kallglot selects one automatically.

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Best Practices

When you know the language, always specify it rather than using auto-detection. This improves accuracy and reduces latency.
For Swiss customers, use de-CH, fr-CH, or it-CH for better recognition of regional accents and vocabulary.
Test your specific language pair before going live. Some pairs may need fine-tuning for domain-specific terminology.
For specialized vocabulary (medical, legal, technical), create custom glossaries to ensure consistent translation.

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Expanding Language Support

Kallglot is continuously expanding language coverage. If you need a specific language or voice capability, contact us at support@kallglot.com.