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Thoughtly supports voices in multiple languages, enabling you to create Voice Agents that communicate with callers worldwide.

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Supported Languages

Choose from voices in dozens of languages, with availability depending on your voice platform:
  • English (US, UK, Australian, Canadian, Indian)
  • Spanish (Spain, Latin American, Mexican)
  • French (France, Canadian)
  • German, Italian, Dutch, Polish, Turkish
  • Portuguese (Brazil, Portugal)
  • Chinese (Mandarin, Cantonese)
  • Japanese, Korean, Arabic, Hindi, Russian

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Choosing the Right Voice

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Match Accent to Market

  • English: US for North America, UK for Europe, Australian for ANZ
  • Spanish: Mexican for Mexico, Castilian for Spain, Argentine for Argentina
  • Portuguese: Brazilian (most common) vs. European
  • Test first: Always get feedback from native speakers in your target market

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Voice Platform Comparison

Choose between ElevenLabs and Cartesia based on your needs:
FeatureElevenLabsCartesia
Voice QualityHigh-fidelity, natural-sounding voicesOptimized for real-time voice generation
LatencyStandard processing timeUltra-low latency voice processing
Voice SelectionWide selection of accents, languages, and personalitiesGrowing library of professional voices
Best ForNatural, expressive conversationsReal-time applications requiring speed
LicensingSubject to ElevenLabs terms and availabilitySubject to Cartesia terms and availability

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Multilingual Agents

Enable language detection to let your agent respond in the caller’s language automatically. Create language-specific knowledge bases using Genius:
  • English Genius → English Voice Agent
  • Spanish Genius → Spanish Voice Agent
  • French Genius → French Voice Agent
This ensures culturally appropriate, accurately translated responses.

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Voice Optimization

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Improve Clarity

  • Write shorter, simpler sentences
  • Avoid jargon and spell out acronyms
  • Use phonetic spelling for unusual names
  • Control pacing with punctuation

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Choose the Right Pace

Slower for: Complex info, technical support, elderly/international audiences, legal/medical Faster for: Urgent notifications, quick updates, energetic sales, time-sensitive info

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Match Tone to Purpose

  • Customer service: Empathetic, patient, professional
  • Sales: Confident, energetic, persuasive
  • Reminders: Friendly, clear, brief
  • Surveys: Neutral, consistent, clear

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Troubleshooting

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Voice Sounds Unnatural

Fix it: Rewrite prompts conversationally, add punctuation for pacing, shorten sentences, use contractions.

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Mispronunciation Issues

Fix it: Use phonetic spelling, add pronunciation guides, break up complex words, spell out terms.

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Wrong Tone

Fix it: Try a different voice, rewrite prompts, adjust conversation flow.

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Advanced Tips

Influence tone with punctuation (! for excitement, … for pauses), word choice, and sentence structure. Specialized vocabulary: Create pronunciation guides in your Genius, use consistent terms, document special spellings. Cultural adaptation: Match greetings and conversation flow to local norms. Test with native speakers.