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fix(tts): name every Kokoro language from the installed table - #2174
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resolve_kokoro_lang_code validates against mlx-audio's own LANG_CODES —
its docstring is explicit that the vendored table is the only source of
truth — but built the "Kokoro supports: …" list in the rejection message
from the hardcoded _KOKORO_ISO_BY_FULL_NAME instead.
That map exists to translate full names into Kokoro's codes, and it has
no entry that produces "b". British English is reachable as en-gb, and
the existing test asserts resolve("en-gb") == "b", yet the message never
mentioned it: the installed table lists nine languages and the message
named eight. Any language a later mlx-audio adds would be dropped the
same way, telling a user to switch engines when they need not.
Derives the labels from ALIASES and LANG_CODES instead, preferring the
full name a caller can actually pass and falling back to the table's own
description for codes no full name reaches.
The derivation takes the tables as arguments, so its tests run on every
platform. The resolution tests around it need the Apple-Silicon-only
package and skip on every CI runner, which is why a message drifting
from the table it documents went unnoticed.
Fixes debpalash#2156
 The PR appears safe to merge with no concrete correctness, security, or repository-rule violations identified. SummaryUpdates Kokoro language handling to derive supported labels from installed
Reviews (7) · Last reviewed commit: "docs: credit Kokoro fix author alongside..." |
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Included review availability: Your plan provides up to 10 included reviews per hour; 7 remain after this review. 📝 WalkthroughWalkthroughChangesKokoro language reporting
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix · Severity of issue fixed: Medium Suggested reviewers: Merge Risk: ⚪ Minimal · up to The Kokoro language-label update has regression coverage for installed aliases and display names, including British English. No merge-blocking risk remains. 🚥 Pre-merge checks | ✅ 8 | ❌ 1❌ Failed checks (1 warning)
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Raises docstring coverage on the changed files past the threshold the PR check enforces; the reasoning each test carried in a leading comment now lives where the checker and a reader both find it.
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Inline comments:
In `@backend/services/tts_backend.py`:
- Around line 1637-1662: Add “british english” mapped to “en-gb” in
_KOKORO_ISO_BY_FULL_NAME so the label emitted by _kokoro_supported_labels
resolves through the existing alias flow to code “b”. Add a regression test
covering selection of “British English” and asserting it resolves successfully.
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CHANGELOG.mdbackend/services/tts_backend.pytests/test_engines.py
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3 participants
Summary
Kokoro language errors now list every language in the installed mlx-audio table, including British English. The advertised “British English” label also resolves successfully to its pipeline code.
Changes
Type
Testing
40 engine tests passed offline; eight optional/platform-specific cases skipped on Linux. British English selection and advertised-label round-trip regressions failed before the fixes and passed afterward. Full CI runs on this branch.
Checklist
Release cadence
Continuous-to-main after review and CI. Related to #2156; profile-language guidance is handled by #2175.
Kokoro now derives supported-language labels from installed
mlx-audiotables and resolves names such as “British English” anden-gb. This keeps validation messages complete and supports newer installed language tables without hardcoded updates. The reported test run passed 40 offline engine tests and skipped eight optional or platform-specific cases on Linux; no review findings were supplied.