Latin America · Mexico
Spanish (Latin American) conversational speech dataset
2,000 hours of spontaneous Spanish (Latin American) conversations recorded in Mexico across 200 vetted native speakers. Dual-channel audio with time-aligned transcripts, speaker metadata (age, gender, region, device), and full chain-of-consent documentation. Licensed for commercial ASR, TTS, and voice AI training.
Dataset specifications
| Language | Spanish (Latin American) |
|---|---|
| Recorded in | Mexico |
| Speech type | Spontaneous two-person conversations |
| Volume | 2,000 hours |
| Speakers | 200 vetted native speakers |
| Audio | Dual-channel (one channel per speaker) |
| Transcripts | Time-aligned, human-verified |
| Metadata | Age, gender, region, recording device |
| License | Commercial (training & evaluation) |
| Price | $65 per hour of audio |
Need more hours, another dialect or your own recording setup? We collect speech data to spec.
Built for
Training and evaluating speech models that must handle real Spanish (Latin American) speech:
- Automatic speech recognition (ASR / STT)
- Text-to-speech & voice synthesis prosody
- Voice agents and IVR for Mexico
- Speaker diarization & turn-taking models
- Speech LLM / audio-understanding fine-tuning
Why conversational data?
Models trained on read speech consistently underperform on spontaneous audio. Disfluencies, overlap, and natural speech rates aren’t in the training distribution. This dataset closes that gap for Spanish (Latin American). Read more in our guide to conversational vs. scripted speech data.
Free samples
Audit the Spanish (Latin American) data yourself
Share your company email and we’ll email you representative audio, matching transcripts, and the metadata schema. Check audio quality, transcript accuracy, and speaker diversity before you spend a dollar.
Public alternatives
Public Latin American Spanish speech data vs. this dataset
| Source | What it is | License | Commercial training |
|---|---|---|---|
| CIEMPIESS Light (opens in a new tab)CIEMPIESS-UNAM Project, National Autonomous University of Mexico (also distributed by LDC as LDC2017S23) | Mexican Spanish radio and TV conversations between a moderator and guests, from UNAM programs, cut into clean single-speaker utterances. | CC BY-SA 4.0 | Allowed |
| Fisher Spanish Speech (LDC2010S01) (opens in a new tab)Linguistic Data Consortium (LDC) | Spanish telephone conversations; speakers recruited in the US and Puerto Rico, raised in many countries. | LDC User Agreement for Non-Members (fee applies; noncommercial research and education only); commercial use requires paid LDC for-profit membership | Paid license |
| Google FLEURS (es_419) (opens in a new tab)Google | Read sentences from the FLoRes benchmark, locale es_419 (Latin American Spanish, not Mexico-specific). | CC BY 4.0 | Allowed |
| Mozilla Common Voice Spanish (Scripted and Spontaneous Speech) (opens in a new tab)Mozilla Common Voice (via Mozilla Data Collective) | Spanish sentences read by volunteers, with curated Mexican Spanish subsets based on self-reported accent; a Spontaneous Speech release adds unscripted answers. | CC0 1.0 | Allowed |
CIEMPIESS Light is free Mexican radio and TV talk; Fisher Spanish is LDC-licensed calls from US-recruited speakers. This dataset is two-person conversation recorded in Mexico, licensed commercially.
Licenses as published by each source, checked October 2026. Check the current terms before use.
FAQ
Frequently asked questions
What does the Spanish (Latin American) speech dataset include?
2,000 hours of spontaneous two-person conversations from 200 vetted native speakers recorded in Mexico, delivered as dual-channel audio with time-aligned transcripts, speaker metadata (age, gender, region, device), and consent documentation.
What makes Latin American Spanish hard for speech recognition?
Mexican Spanish is the largest Spanish variety by number of speakers. It has its own intonation and vocabulary, including Nahuatl words like "jitomate" and "cuate". Casual conversation adds fast speech, slang and English loanwords, so models trained on European Spanish or read text underperform here.
Is there free Latin American Spanish speech data?
Yes, CIEMPIESS Light, Google FLEURS and Mozilla Common Voice Spanish are free for commercial use. Fisher Spanish Speech needs a paid license. This dataset is spontaneous two-person conversation recorded in Mexico, with speaker metadata, one channel per speaker and signed commercial-use consent.
Can I use this Spanish (Latin American) dataset commercially?
Yes. The dataset is licensed for commercial use, including training ASR, TTS, and other voice-AI models. Every speaker has signed explicit commercial-use consent, and we provide the full consent chain for your legal review.
How much does the Spanish (Latin American) speech dataset cost?
Pricing is $65 per hour of audio. Volume discounts are available for full-dataset and multi-language purchases. Contact us for a quote.
Can I evaluate samples before buying?
Yes. Request samples with your company email, and we'll email you representative audio files and matching transcripts so your team can audit quality before committing.
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