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.

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.

Latency Overview

Tier	Languages	End-to-End Latency
Real-Time	16	~1–1.5 seconds
Extended	13	~3–4 seconds

Latency may vary slightly depending on network conditions and call routing.

Real-Time Languages

These languages are optimized for low-latency conversations (~1–1.5s).

Language	Code
English	`en`
German	`de`
French	`fr`
Spanish	`es`
Italian	`it`
Portuguese	`pt`
Dutch	`nl`
Polish	`pl`
Russian	`ru`
Japanese	`ja`
Korean	`ko`
Chinese (Mandarin)	`zh`
Hindi	`hi`
Turkish	`tr`
Vietnamese	`vi`
Ukrainian	`uk`

Extended Languages

These languages are fully supported but may have higher latency (~3–4s).

Language	Code
Arabic	`ar`
Swedish	`sv`
Norwegian	`no`
Danish	`da`
Finnish	`fi`
Greek	`el`
Czech	`cs`
Romanian	`ro`
Hungarian	`hu`
Thai	`th`
Indonesian	`id`
Malay	`ms`
Hebrew	`he`

Regional Variants

For improved transcription accuracy, you can specify regional variants using ISO language and country codes.

Variant	Code	Base Language
Swiss German	`de-CH`	German
Austrian German	`de-AT`	German
Swiss French	`fr-CH`	French
Canadian French	`fr-CA`	French
Swiss Italian	`it-CH`	Italian
Brazilian Portuguese	`pt-BR`	Portuguese
European Portuguese	`pt-PT`	Portuguese
Latin American Spanish	`es-LA`	Spanish
Castilian Spanish	`es-ES`	Spanish
British English	`en-GB`	English
American English	`en-US`	English
Australian English	`en-AU`	English

Using Regional Variants

{
  "mode": "bidirectional_translation",
  "source_language": "de-CH",
  "target_language": "fr-CH"
}

Kallglot automatically applies the appropriate models.

Language Detection

Kallglot can automatically detect the spoken language:

{
  "mode": "bidirectional_translation",
  "source_language": "auto",
  "target_language": "en"
}

Notes

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

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
}

Translation Quality

Highest Quality

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

High Quality

All combinations between:

English, German, French, Spanish, Italian, Portuguese, Dutch, Polish, Russian

Standard

All other supported combinations are handled automatically.

Voice Options

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.

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.

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.

Best Practices

Use specific language codes

When you know the language, always specify it rather than using auto-detection. This improves accuracy and reduces latency.

Prefer regional variants

For Swiss customers, use de-CH, fr-CH, or it-CH for better recognition of regional accents and vocabulary.

Test translation flows

Test your specific language pair before going live. Some pairs may need fine-tuning for domain-specific terminology.

Use glossaries for domain terms

For specialized vocabulary (medical, legal, technical), create custom glossaries to ensure consistent translation.

Expanding Language Support

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

​Supported Languages

​What “Supported” Means

​Latency Overview

​Real-Time Languages

​Extended Languages

​Regional Variants

​Using Regional Variants

​Language Detection

​Notes

​Detected Language Event

​Translation Quality

​Highest Quality

​High Quality

​Standard

​Voice Options

​Custom Voices (Kallglot Managed)

​Standard Voices

​Using a Voice

​Best Practices

​Expanding Language Support

Supported Languages

What “Supported” Means

Latency Overview

Real-Time Languages

Extended Languages

Regional Variants

Using Regional Variants

Language Detection

Notes

Detected Language Event

Translation Quality

Highest Quality

High Quality

Standard

Voice Options

Custom Voices (Kallglot Managed)

Standard Voices

Using a Voice

Best Practices

Expanding Language Support