Probing XTTS's seventeen languages after the truncation fix: fifteen spoke, and
the two with non-Latin scripts failed on dependencies coqui-tts does not declare.

    zh-cn -> ImportError: Chinese requires: pypinyin
    ja    -> ModuleNotFoundError: No module named 'cutlet'

So the venv installs cleanly, reports success, advertises all seventeen, and then
refuses two of them at synthesis time — the same shape as the torch that was
never installed, which is what pinned this file in the first place. They are now
declared in requirements-xtts.txt and in the _PINS copy the worker falls back to
when the file is not mounted (a test keeps the two in step).

cutlet romanises through fugashi, which needs its dictionary at RUNTIME and not
only at install, so unidic-lite is declared too — the chain
requirements-melotts.txt already notes for MeloTTS.

pypinyin is pure Python and is installed on zeiss now, so Chinese works there.
Japanese needs a build: cutlet pulls mojimoji, which ships no cp313 wheel, so it
compiles — gcc and the Python headers are both in the image, but the install has
to run where build deps are available. It is declared here so an image build
picks it up.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014T3rZozi1Ehk96NG1WesgC