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Correct Chrome locale note for word-break: auto-phrase - #30360

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woohyun-park:fix/word-break-auto-phrase-korean-note
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Correct Chrome locale note for word-break: auto-phrase#30360
woohyun-park wants to merge 1 commit into
mdn:mainfrom
woohyun-park:fix/word-break-auto-phrase-korean-note

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Summary

Correct the Chrome support note for word-break: auto-phrase to include Korean (ko) as well as Japanese (ja).

The updated note distinguishes Chrome's ML-based Japanese phrase-breaking engine from ICU's non-ML Korean phrase-breaking path, and clarifies that unsupported locales behave as normal.

Test results and supporting details

  • npm test passes.
  • Runtime behavior was verified with identical lang="ko" elements in Google Chrome 152.0.7977.65 on macOS 26.4.1. Changing only word-break produced different Korean break opportunities for normal and auto-phrase.
  • The Chrome 119 ICU revision already contains the source comment that phrase breaking supports Japanese and Korean, while MlBreakEngine supports only Japanese. I did not independently run Chrome 119.

Supporting sources:

The full reproduction and rationale are documented in the related issue.

Related issues

Fixes #30359

@github-actions github-actions Bot added data:css Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:xs [PR only] 0-6 LoC changed labels Aug 28, 2026
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data:css Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:xs [PR only] 0-6 LoC changed

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word-break: auto-phrase - Chrome note incorrectly excludes Korean

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