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wordcraft/crates/layout
1fc34fc147 Proofing: Vietnamese text under the default English language gets no marks (#1553)
A document typed in Vietnamese under the default editing language (en-US) was
covered in red underlines, every Vietnamese word checked as English. A
paragraph that reads as Vietnamese (words with Vietnamese-only letters: the
breve and horn letters, đ, ĩ ũ, the tone-marked vowels of Latin Extended
Additional, or stacked combining marks) is now treated like any language
without proofing tools: no spelling or grammar marks, as Word's automatic
language detection does. A Vietnamese name in English text (Nguyễn) is no
longer flagged either; French and Portuguese, which share â ê ô, are unaffected.

Automatic hyphenation also leaves Vietnamese paragraphs and words whole
(single syllables never take a hyphen); the English patterns happen not to
split these words today, and the guard keeps it so.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
2026-10-14 23:12:46 -04:00
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