Files
pdfcraft/docs/localization-parity.md
T
sanches 1ff8fe4800 i18n: add Indonesian and Vietnamese interfaces
Two new complete catalogs (2542 entries each, full coverage of the
uk.tsv key set): Indonesian (id) and Vietnamese (vi), both with a
single plural form per CLDR. Registered in LANGUAGES (22 → 24) with
locale-tag tests. Also adds Devanagari font support (for the upcoming
Hindi catalog) to the fonts crate, and fixes 19 duplicate keys in
ru.tsv that crept in during a previous merge.

Tests: 110 passed, 0 failed.
2026-10-14 00:07:07 +03:00

6.9 KiB
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Localization parity

Last reviewed: 2026-10-10 · Last updated: 2026-10-13 · Change: minor (Indonesian and Vietnamese ship as full 2,578-key catalogs; the key union is now 2,578; the localization dimension re-measures at ≈ 76%) · Target: Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)

Per-language status of PdfCraft's interface against Acrobat Pro's. How translations work and how to add a language: localization.md. Summary in ROADMAP.md.

How this was measured

  • Strings translated is measured: the catalogs in crates/ui-egui/src/i18n/<code>.tsv, counted as distinct (context, English) keys with a non-empty translation. The denominator is the union of keys across all catalogs, 2,578 (it was 2,143 until the Lithuanian catalog arrived; the percentages in the table below for the languages measured on 2026-10-10 are that older snapshot's). Cross-check: of the tl!("…") literals in crates/ui-egui/src, Indonesian and Vietnamese translate every one of them (required by indonesian_and_vietnamese_cover_ui_literals), and two literals are in no catalog yet. English is built in.
  • Not counted: error details from the engine and the operating system, which are shown in English inside a translated frame; there is no translated user documentation or help yet (Acrobat ships localized help).
  • Script support comes from localization.md, the vendored winit IME patches (vendor/README.md) and user reports.
  • Native review: "community" means a native speaker contributed or corrected the catalog in a pull request or issue; "no" means no record of review. No catalog has had a formal review.
  • Acrobat ships 24 interface localizations on macOS (.lproj: cs, da, de, en, es, fi, fr, hu, it, ja, ko, nl, no, pl, pt, ru, sv, tr, uk, zh_CN, zh_TW, plus en_AE, en_IL, fr_MA) and Middle East / North Africa editions (MEA Arabic, MEH Hebrew, NAF French; Resources/Sequences/).

The twelve key languages

Language Code UI strings translated Dialogs / tooltips / help Script support Native review Status Acrobat ships it To full (h)
English en built in (100%) all; README and docs Latin yes full yes 0
Simplified Chinese zh-hans 2,088 (97.4%) dialogs and tooltips through tl!; no help CJK text and IME work, but release builds have no Hans face: many characters show as boxes (#826, #688, #728, #758; Flatpak #689) no partial yes 6–12
Spanish es 2,046 (95.5%) dialogs and tooltips; no help Latin no partial yes 2–4
Hindi hi 0 none Devanagari not tested (egui shapes Telugu conjuncts, so shaping is likely workable); no Devanagari face in craft-fonts no none no 10–18
Arabic ar 2,143 (100%) dialogs and tooltips; no help Letters joined and lines reordered at load, but layout not mirrored, wrapped lines break at the wrong end, typed text runs left to right (localization.md §Arabic) no partial yes (Middle East edition) 25–45
French fr 2,128 (99.3%) dialogs and tooltips; no help Latin no partial yes 1–2
Portuguese (Brazil) pt-br 2,130 (99.4%) dialogs and tooltips; no help Latin community (#288) partial yes 1–2
Indonesian id 2,578 (100%) dialogs and tooltips through tl!; no help Latin, drawn by the bundled Inter and JetBrains Mono (tested in crates/ui-egui/tests/fonts.rs) no partial no 1–2
Japanese ja 2,123 (99.1%) dialogs and tooltips; no help BIZ UDPGothic from craft-fonts; IME patched on macOS, Windows, X11, Wayland; vertical text renders but can't be edited no partial yes 4–8
German de 2,128 (99.3%) dialogs and tooltips; no help Latin community, in progress (#828: terminology, clipping) partial yes 2–4
Korean ko 0 none Hangul IME patched (Microsoft and Apple Korean, vendor/README.md winit 3, 6, 9, 10); no Hangul UI face in craft-fonts no none yes 6–10
Vietnamese vi 2,578 (100%) dialogs and tooltips through tl!; no help Latin with stacked diacritics; the bundled Inter covers them, tested in crates/ui-egui/tests/fonts.rs no partial no 1–2

Localization dimension ≈ 76%: the mean over the twelve, counting a catalog's percentage but only 60% for Chinese and Arabic until their script problems are fixed, and 0 for the two languages still missing (Hindi, Korean). ≈ 55–90 h to bring all twelve to full, of which ≈ 35–60 h is engineering (Hans face, RTL layout, bidi text) and the rest the two remaining catalogs and fixes; native-speaker review needs humans.

No language is full except English: every catalog leaves engine error details in English, and none has translated help.

Other shipped languages

Language Code UI strings translated Status Acrobat ships it
Traditional Chinese zh-hant 2,016 (94.1%) partial (same Hans/Hant face caveat) yes
Russian ru 2,043 (95.3%) partial yes
Bulgarian bg 2,094 (97.7%) partial no
Czech cs 135 (6.3%) menus only yes
Telugu te 2,058 (96.0%) partial (the release-pinned craft-fonts has no Telugu face yet) no
Hungarian hu 2,126 (99.2%) partial yes
Ukrainian uk 2,142 (100%) partial yes
Italian it 2,130 (99.4%) partial yes
Kazakh kk 2,327 entries partial no
Polish pl 2,287 entries partial yes
Slovenian sl 2,324 entries partial no
Greek el 2,341 entries partial no
Turkish tr 2,313 entries partial yes
Lithuanian lt 2,578 entries partial; community native-speaker review (#1401) no

14 other languages ship (23 catalogs plus English, 24 interface languages in Preferences). The entry counts without percentages were measured on 2026-10-12; they are not percentages of the older 2,143-key snapshot above. Their presence does not imply a detailed linguistic or runtime review. Acrobat languages PdfCraft lacks: Danish, Dutch, Finnish, Norwegian, Swedish, Hebrew.

Revision history

Date Change Summary
2026-10-13 minor Indonesian and Vietnamese ship as full 2,578-key catalogs with month and weekday names; the key union is 2,578 and the dimension re-measures at ≈ 76% (Hindi and Korean are the two languages still missing)
2026-10-12 minor Added current counts for Kazakh, Polish, Slovenian, Greek, Turkish and Lithuanian; retained existing language assessments and the original percentage snapshot
2026-10-10 major Created. Catalog counts measured from crates/ui-egui/src/i18n/*.tsv against the 2,143-key union; Acrobat's localizations from its bundle's .lproj and Sequences folder names