Chinantec Speech to Text: Preserving a Tonal Language with AI

Chinantec, known natively as Jújmi, is a tonal language family spoken by indigenous communities in the northern mountains of Oaxaca, Mexico. With an estimated 140,000 speakers, it remains a vital part of daily life, but like many minority languages, it faces challenges from language shift and limited digital resources. Accurate speech-to-text technology can play a key role in revitalization, education, and documentation.

Where Chinantec is Spoken

Chinantec is primarily spoken in the Chinantla region of Oaxaca, encompassing municipalities such as Usila, Ojitlán, Chiltepec, and Valle Nacional. Each community has its own dialect, with differences in tone, vocabulary, and pronunciation. The language is part of the Oto-Manguean family, which includes other Mexican indigenous languages like Mixtec and Zapotec.

Why Accurate Speech-to-Text Matters

For Chinantec speakers, having access to transcription and subtitle generation means:

• Preserving oral traditions: Stories, songs, and rituals passed down orally can be documented in written form.
• Improving education: Bilingual materials can be created quickly, helping children learn to read in their native language.
• Enhancing accessibility: Deaf community members who read Chinantec benefit from captions on videos.
• Supporting research: Linguists can analyze speech patterns and grammar without manual transcription bottlenecks.

Specific Transcription Challenges

Chinantec presents several challenges for automatic speech recognition:

Tonal System

Chinantec languages are tonal, meaning that pitch changes distinguish word meanings. For example, a single syllable can have up to five different tones. General ASR systems often ignore tones, leading to misunderstandings. Speechyou's model uses pitch tracking and contextual analysis to preserve tone information.

Vowel Nasalization

Nasal vowels are common in Chinantec and must be distinguished from oral vowels. Our acoustic model is trained on nasalized vowels across multiple dialects to ensure accurate recognition.

Dialectal Variation

A word in Usila Chinantec may be pronounced very differently in Ojitlán Chinantec. Speechyou offers separate models for major dialects, and we are expanding coverage based on user feedback.

Use Cases for Chinantec Transcription

Podcasts and Radio

Community radio stations in Chinantla can now automatically transcribe their broadcasts, generating text archives and subtitles for online distribution. This helps reach younger listeners who may be more comfortable with written Chinantec.

Subtitle Generation

Video content creators—whether for YouTube, educational platforms, or social media—can use Speechyou to add SRT or VTT subtitles in Chinantec. This is especially useful for bilingual videos that include Spanish explanations.

Oral History Preservation

Elders in Chinantec communities hold invaluable knowledge. With Speechyou, interviews can be transcribed quickly, creating a permanent written record. The transcripts can be stored in digital archives or printed for community use.

Research and Linguistics

Field linguists often spend hours transcribing recordings. Speechyou reduces this time dramatically, allowing them to focus on analysis. The output can be exported in plain text or with timestamps for alignment with audio.

How Speechyou Helps

Speechyou is designed with low-resource languages in mind. Our Chinantec models are built on a combination of publicly available corpora, community contributions, and collaborative data collection. We support:

• Multiple Chinantec dialects (Usila, Ojitlán, Chiltepec, and more in development)
• Tone marking in output (optional)
• Customizable orthography (users can choose or upload their own)
• High accuracy even with background noise or multiple speakers

Our platform is simple: upload an audio or video file, select the language variety, and receive a transcript within minutes. You can also generate subtitles directly. The Solo plan gives unlimited transcription, making it affordable for individuals and small organizations.

Conclusion

Chinantec is a rich and complex language that deserves modern tools for its preservation. Speechyou provides a reliable, accessible way to convert spoken Chinantec into text, empowering speakers, educators, and researchers alike. Whether you are documenting a story, creating subtitles, or teaching the next generation, our AI is ready to help.