Cacua Speech to Text: Bringing an Endangered Language into the Digital Age

Cacua (also known as Kakua) is a language spoken by a small community in the Colombian Amazon, along the Vaupés River. With fewer than 200 speakers, it is classified as critically endangered by UNESCO. The language belongs to the Maku family and is distinct from the Tukanoan languages spoken in the same region. Cacua has a complex sound system, including tones and nasalized vowels, and is written with a Latin-based alphabet.

Why Accurate Speech to Text for Cacua Matters

For a language with so few speakers, every tool that helps document and transmit it is valuable. Speech-to-text technology can:

• Create written records of oral traditions, stories, and songs.
• Generate subtitles for videos, making content accessible to younger speakers who may be more literate in Spanish.
• Assist linguists in transcribing field recordings quickly.
• Support language revitalization programs in schools and community centers.

Without such tools, much of the language's knowledge risks being lost as elders pass away.

Specific Challenges in Transcribing Cacua

Cacua presents several challenges for automatic speech recognition (ASR):

• Tonal system: Cacua has three tones (high, low, falling) that change word meaning. For example, /ˈka/ with high tone means 'house', while /ˈkà/ with low tone means 'water'. Standard ASR models often miss these distinctions.
• Prenasalized consonants and vowel nasalization: Sounds like /mb/ and /nd/ are common, and vowels can be nasalized, which can be confused with other phonemes.
• Limited digital data: There are very few transcribed recordings of Cacua, making it a low-resource language for AI training.

Speechyou overcomes these challenges by using a neural network trained on tonal languages and by incorporating transfer learning from related Maku languages. The system also allows users to correct transcriptions, which improves accuracy over time.

Use Cases for Cacua Transcription

Oral History Preservation

Elders can record their knowledge of forest plants, hunting techniques, and traditional stories. Speechyou transcribes these recordings, creating a searchable archive.

Subtitles for Community Videos

Videos of ceremonies, language lessons, or daily life can be subtitled in Cacua, making them accessible to the community and to researchers.

Educational Materials

Teachers in bilingual schools can create reading primers from spoken Cacua, helping children become literate in their native language before learning Spanish.

Academic Research

Linguists and anthropologists use Speechyou to transcribe interviews and field notes, saving weeks of manual work.

How Speechyou Helps

Speechyou is the only commercial speech-to-text platform that supports Cacua. You can upload audio or video files directly in your browser, and the system returns a transcript with timestamps. You can then export the transcript as SRT or VTT subtitles, or as plain text. The interface is simple: no technical setup required.

For the Cacua community, this means that anyone with a smartphone and an internet connection can start transcribing. For researchers, it means faster turnaround on field data. And for the language itself, it means a digital footprint that can help ensure its survival.

Get Started

Ready to transcribe Cacua audio? Sign up for Speechyou's Solo plan, which includes unlimited transcription. No per-minute fees, no hidden costs. Just upload your file and get your transcript in minutes.