Vietnamese speech dataset
Vietnamese speech across all three regional varieties with fully diacritised transcripts — plus accented English and German recorded from native Vietnamese speakers for accent-robust ASR.
| Language | Vietnamese |
|---|---|
| Endonym | Tiếng Việt |
| ISO 639-3 | vie |
| Speaker population | ~85 million |
| Primary regions | Vietnam; diaspora in the US, Germany, Czechia, Japan |
| Dialects covered | Northern (Hanoi), Central (Huế), Southern (Ho Chi Minh City) |
| Hours available / collectable | 2,000 hours available · up to 4,000 hours/quarter collectable |
| Recording spec | 48 kHz / 24-bit WAV, mono, plus accented-English and German sessions |
| Transcript availability | Quốc ngữ with full diacritics, tone-verified |
| Consent basis | Written informed consent, commercial AI training explicitly named |
| License terms | Perpetual, worldwide, non-exclusive; exclusivity negotiable |
| Related languages | Thai, Khmer, Burmese, Malaysian Malay, Tagalog |
Why Vietnamese data is hard to find
Vietnamese is six-tone in the north and five in the south, and public corpora rarely tag which variety a speaker uses. Diacritics are routinely dropped in online text, so scraped transcripts are tonally ambiguous. Accented-English data from Vietnamese speakers barely exists publicly despite being what many deployments actually encounter.
What we can collect
- —Region-tagged read and conversational speech (North, Central, South)
- —Accented English and German from native Vietnamese speakers
- —Call-centre and customer-service audio
- —Vietnamese–English translation pairs
Licensing and consent
Written informed consent, commercial AI training explicitly named. Delivery is under perpetual, worldwide, non-exclusive; exclusivity negotiable. Call and conversational audio is redacted for personal information before hand-off, and every recording carries a documented consent chain you can audit.
Need Vietnamese data at scale?
Send us hours, dialect mix and domain — we'll come back with a collection plan.
Talk to our sourcing team