15,000+ hours of audio transcription across 80+ languages
This is not a single project. It is a standing transcription operation serving multiple AI-focused companies through LSP partners. 15,000+ hours of audio transcription across 80+ languages, delivered in weekly batch cycles with project-scoped quality review. The operation runs continuously, with new languages onboarded through a templated process that gets production-ready after scoped review.
15,000+ hours of audio - Weekly batch cycles
110,000+
native linguists and AI data contributors
Founder-reported combined network · 4 Oct 2026
300+
languages across active service lines
4,500+
dialects and regional variants
1,000+
organizations served since 2015
Measured outcomes
Audio transcription standing operation
Audio transcription standing operation
- Client
- Multiple AI-focused companies (via LSP partners)
- Service
- Audio Transcription
- Volume
- 15,000+ hours of audio
- Delivery
- Weekly batch cycles
The problem to solve
AI companies building speech recognition and natural language processing models need transcribed audio data in hundreds of languages. The high-resource languages, English, Spanish, Mandarin, have mature transcription infrastructure. The rare languages do not. When a client needs transcribed audio in Fanti, Chadian Arabic, Tok Pisin, or Teso, the typical vendor response is silence or a slow sourcing response.
Scale was only the first constraint. It is consistency at scale. 15,000+ hours of audio across 80+ languages means managing hundreds of transcribers working in different scripts (Latin, Arabic, Bengali, Cyrillic), different audio quality conditions, and different transcription conventions. A single transcriber using the wrong orthographic convention in Chadian Arabic can contaminate an entire training dataset.
Clients need weekly delivery cadence. Not monthly. Not "when ready." Every week, a batch ships. If a language pair cannot meet the weekly window, the client's ML training pipeline stalls.
How AI data annotation services was delivered
We built this operation for repeatability. Every new language pair follows the same onboarding template. Every batch follows the same QA sequence. The system runs whether the language is Fanti or French.
Templated new-language onboarding:
When a new language is requested, we follow a documented playbook: source 3-5 candidate transcribers, run a paid test batch (2-3 hours of audio), evaluate against accuracy and formatting benchmarks, select the top performers, and brief them on project-specific guidelines. This process takes a scoped onboarding window for most languages. For extremely rare languages, up to 10 days.
Script-specific QA checklists:
We maintain four separate QA frameworks — one each for Latin, Arabic, Bengali, and Cyrillic scripts. Each checklist covers script-specific risks: diacritical mark accuracy for Arabic, conjunct character validation for Bengali, transliteration consistency for Cyrillic-to-Latin pairs, and tone marking for applicable Latin-script languages.
Double-blind review for first batches:
The first two batches from any new transcriber go through double-blind review. Two independent reviewers assess the same audio segment without seeing each other's output. Disagreements are resolved by a senior linguist. This catches calibration issues before they become systemic.
Weekly batch delivery with quality gates:
Every weekly batch passes through three checkpoints before delivery: transcriber self-review, independent QA reviewer check, and project manager sign-off with spot-check sampling. Batches that fail any checkpoint are held and reworked before the next delivery window.
Partner coordination layer:
Since this operation serves multiple end clients through LSP partners, we maintain a coordination layer that manages project-specific requirements (annotation guidelines, formatting specs, metadata fields) per partner without cross-contaminating data between clients.
What was delivered on this engagement?
The operation continues to expand. New language pairs are added regularly through the templated onboarding process. Partner feedback consistently cites two things: the ability to add rare languages without extended sourcing delays, and the consistency of output quality across batch cycles.
| Volume delivered | 15,000+ hours of audio transcribed |
|---|---|
| Total languages | 60+ (majority rare/low-resource) |
| Script systems | 4 (Latin, Arabic, Bengali, Cyrillic) |
| Accuracy | Reviewed per engagement rules |
| Delivery cadence | Weekly batch cycles |
| New-language onboarding | a scoped onboarding window (templated) |
| QA methodology | Script-specific checklists + double-blind first-batch review |
What supported the result
Why this team fit the assignment
LSP partners needed a production backbone that could handle rare languages they could not source in-house — Fanti, Chadian Arabic, Tok Pisin, Teso — without the partners losing control of the client relationship. MoniSa operates as a white-label production layer: the partner's brand, our production.
Why the result held
Templated onboarding for new languages (3-5 days for most, 10 for extremely rare) plus script-specific QA frameworks meant the operation could absorb new language requests without rebuilding the pipeline each time. That repeatability is what turns a one-off project into a standing operation.
What buyers can reuse
- Standing operations require templated processes, not hero efforts. The difference between a one-off transcription project and a 15,000+ hours of audio standing operation is repeatability. Documented onboarding, standardized QA checklists, and weekly delivery rhythms turn rare-language transcription from a sourcing problem into an operational process.
- Script-specific QA catches errors that generic checklists miss. A single QA template across Arabic, Bengali, Cyrillic, and Latin scripts would miss half the errors. Each script system has its own failure modes. Separate checklists per script system are not optional at this scale.
- Double-blind review on first batches prevents downstream data contamination. For AI training data, a calibration error in batch 1 that goes undetected propagates through every subsequent batch. The cost of double-blind review on the first two batches is a fraction of the cost of reprocessing contaminated training data.
- Partner coordination at this scale requires project-level data isolation. Serving multiple end clients through LSP partners means annotation guidelines, formatting specs, and metadata fields cannot bleed across projects. Separate secure workspaces per client are not a security nicety. They are an operational requirement when one mis-routed file can violate an NDA.
Work connected to Audio transcription standing operation
Related services, buying guidance and language coverage
AI data annotation services and buyer guidance
Languages listed
More proof
Compare this case with AI audio data, 28,000+ hours across 50+ languages and OTT streaming, 7 rare African and Southeast Asian languages to judge whether the operating pattern fits your brief.
What changed in the work
Not the result — the decision taken mid-programme that the result depended on.
The same template, whatever the language
Repeatability is not a slogan here. A new language enters through the same onboarding form and the same QA sequence, so the system runs whether the language is Fanti or French.
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15,000+ hours of audio transcription across 80+ languages questions
What was delivered on this engagement?
Volume delivered: 15,000+ hours of audio transcribed. Total languages: 60+ (majority rare/low-resource). Script systems: 4 (Latin, Arabic, Bengali, Cyrillic)
Which control supported the Audio transcription standing operation result?
Templated onboarding for new languages (3-5 days for most, 10 for extremely rare) plus script-specific QA frameworks meant the operation could absorb new language requests without rebuilding the pipeline each time. That repeatability is what turns a one-off project into a standing operation.
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