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Conflicts: - docs/localization-parity.md: header keeps the newer date and both changes
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Localization parity
Last reviewed: 2026-10-13 · Last updated: 2026-10-20 · Change: minor (German form of address: du; Indonesian and Finnish interface catalogs added; Italian: every interface string translated, native-speaker corrections; Vietnamese shipped; previously minor: de, es, fr, ja, uk catalogs filled; re-measured; Italian and Georgian interface catalogs added) · Target: Adobe Lightroom Classic 15.5 / Lightroom 9.6
How far each interface language is from full. How to add or maintain a language is in
localization.md; per-language notes are in localization-<code>.md
(zh-hans, zh-hant, ja,
pt-br, es, de,
ru, fi, ka, id, vi).
The target
Lightroom 9.6 (installed on the owner's Mac) ships 16 interface languages, listed from its bundle's
.lproj folder names: English, German, Spanish, French, Italian, Japanese, Korean, Norwegian Bokmål,
Dutch, Polish, Portuguese (Brazil), Russian, Swedish, Thai, Simplified Chinese and Traditional
Chinese. It does not ship Hindi, Arabic, Indonesian or Vietnamese, so for those LightCraft would
go beyond the target.
How the numbers are measured
Measured (a Python count over crates/ui-egui/locales/*.json, 2026-10-13):
- The denominator is every message any catalog knows: the union of the plain catalogs' keys (2,222
English source strings: menus, commands, controls, panels, dialogs, tooltips, presets, What's New
lines) plus the 249 messages of the formats catalogs (
*-formats.json: text with runtime values and date patterns), 2,471 messages in all. - A message counts as translated when the catalog has a non-empty value that differs from the English
key. Some identical values are correct (
ISO,OKin German), so the figure slightly understates coverage; on the other hand, strings that never reach a catalog (technical errors raised in lower crates, someformat!text outsidetr_format!) are not in the denominator at all. That is why no language isfulleven at 99%. - The UI has 563 distinct
tr("…")literals and 198tr_format!messages incrates/ui-eguiandapps/; command, control, menu and preset labels reach the catalogs throughdisplay_label.
Script support is checked against the code: language_table! in crates/ui-egui/src/i18n.rs lists
scripts Latn, Cyrl, Hans, Hant, Jpan only. The UI is egui, which has no bidirectional layout
and no complex-script shaping, so Arabic (RTL, joining) and Devanagari (conjuncts, reordering) cannot
render correctly today.
Native-speaker review: no catalog has had a formal review. Several catalogs have edits from community
contributors whose commits only touch that language (ja, zh-hans, zh-hant, fr, de, ru, uk, pt-br);
that is promising but is not recorded as review, so the column says no (community edits).
Form of address: German speaks to the user with du ("Wähle ein Foto", "Dein Name"), never Sie. LightCraft is built by its community, and du is how people helping each other talk. A new German string follows that.
The twelve key languages
| # | Language | Code | UI strings translated | Dialogs / tooltips / help | Script support | Native review | Status | To full |
|---|---|---|---|---|---|---|---|---|
| 1 | English | en |
2,304 / 2,304 (100%, source) | all; Help ▸ What's New and the shortcut sheet; no full user manual | Latin (Inter) | n/a | full | 0 h |
| 2 | Simplified Chinese | zh-hans |
1,994 / 2,304 (87%) | menus, panels, dialogs, presets, profiles, dates; lower-layer errors English | Hans via craft-fonts (Noto Sans CJK SC); IME through winit; no vertical text in UI (not in target either) | no (community edits) | partial | 6–10 h |
| 3 | Spanish | es |
2,362 / 2,398 (98%; 2026-10-12) | as zh-hans | Latin | no (community edits) | partial | 2–4 h (native review, lower-layer errors) |
| 4 | Hindi | hi |
0 (0%) | none | Devanagari shaping missing (egui has no complex shaping) | no | none (target: not shipped) | 50–90 h (shaping 25–50 h, shared with Arabic) |
| 5 | Arabic | ar |
0 (0%) | none | RTL layout and Arabic shaping missing | no | none (target: not shipped) | 60–110 h (RTL mirroring 30–50 h + shaping, shared with Hindi) |
| 6 | French | fr |
2,315 / 2,398 (97%; 2026-10-12, the rest are words spelled the same) | as zh-hans | Latin | no (community edits) | partial | 2–4 h (native review, lower-layer errors) |
| 7 | Portuguese (Brazil) | pt-br |
1,966 / 2,304 (85%) | as zh-hans | Latin | no (community edits) | partial | 6–10 h |
| 8 | Indonesian | id |
2,555 / 2,555 (100%; 2026-10-19: every plain and formats message any catalog has, plus 69 command labels; What's New left in English) | as zh-hans | Latin (Inter covers it) | no (written with an agent; native-speaker pass pending) | partial (target: not shipped) | 2–4 h (native review, lower-layer errors) |
| 9 | Japanese | ja |
2,383 / 2,398 (99%; 2026-10-12) | as zh-hans; vertical export watermarks | Jpan via craft-fonts (BIZ UDPGothic / UDMincho); IME through winit | no (community edits) | partial | 2–4 h (native review, lower-layer errors) |
| 10 | German | de |
3,644 / 3,754 (97%; 2026-10-16: every interface message and every What's New line except 59: the distinct What's New lines whose English text has a ▸ menu path have no German entry yet and wait for #2016; the rest are words spelled the same) | as zh-hans; What's New translated line by line | Latin | no (community edits) | partial | 2–4 h (native review, lower-layer errors) |
| 11 | Korean | ko |
0 (0%) | none | no Korean (Hangul) face: needs a non-Adobe OFL face in craft-fonts (Noto CJK is allowed only for Chinese) | no | none | 14–22 h |
| 12 | Vietnamese | vi |
2,471 / 2,471 (100% key coverage of current union; intentional English like ISO/OK kept) |
menus, panels, dialogs, presets, profiles, dates, formats; lower-layer errors English | Latin with stacked diacritics (Inter) | no (community contribution) | partial (catalog complete; lower-layer errors English) | 1–3 h |
Other languages LightCraft ships (4)
| Language | Code | UI strings translated | Script | Native review | Status | To full |
|---|---|---|---|---|---|---|
| Traditional Chinese (Taiwan) | zh-hant |
1,993 / 2,304 (87%) | Hant; uses the Simplified Chinese face until craft-fonts has a TC face | no (community edits) | partial | 8–14 h (incl. the font) |
| Russian | ru |
1,704 / 2,304 (74%) | Cyrillic (Inter) | no (community edits) | partial | 8–12 h |
| Ukrainian | uk |
2,383 / 2,398 (99%; 2026-10-12) | Cyrillic (Inter) | no (community edits) | partial (lower-layer errors English) | 2–4 h |
| Italian | it |
2,628 / 3,278 (80%, measured 2026-10-15; every interface string is translated, the other 650 are What's New lines, left in English) | Latin (Inter) | partly (written with an agent; corrections and the 2026-10-15 additions by a native speaker) | partial (lower-layer errors English) | 3–5 h |
| Georgian | ka |
2,398 / 2,398 (100%: every plain and formats message any catalog has on 2026-10-12, plus the 27 display labels and 397 What's New lines no other catalog translates) | Geor: no craft-fonts face yet (boxes until one is available) | yes (native speaker) | partial (lower-layer errors English) | 2–4 h (+ a Georgian face) |
| Finnish | fi |
2,610 / 3,308 (79%, measured 2026-10-17: 2,313 plain + 297 formats; the rest is What's New) | Latin (Inter) | yes (written with an agent; native-speaker review by @roopeg) | partial (lower-layer errors English) | 3–5 h |
Target languages LightCraft lacks: Korean, Dutch, Polish, Swedish, Norwegian Bokmål, Thai (Thai needs shaping and line breaking without spaces). Each Latin-script one is ~10–16 h; Thai ~20–35 h on top of the shaping work.
Shared work before any language is full (counted once, ~20–35 h)
- Route lower-layer error messages (catalog, raw, codecs, engine) through translatable message ids
instead of English
format!strings (~12–20 h). Translating them must not change what the app does: since #1046 the interface decides on an error's kind (lightcraft_engine::ErrorKind, a download's or Apple Photos import'scancelledflag), not its words; new decisions on an error go through a kind too. - A check in
cargo xtask cithat every user-visible literal reaches a catalog (~4–8 h). - A user manual / help pages beyond What's New and the shortcut sheet (Lightroom links to online help; ~4–8 h for a translatable in-app help index).
- Native-speaker review passes (human; cannot be done by agents).
Totals
- Bring the 10 shipped non-English catalogs to
full: ~55–90 h (incl. the shared work). - Add the 5 missing key languages: ~145–255 h, most of it RTL and complex shaping in egui.
- Reach the target's 16 languages: + ~50–85 h (Dutch, Polish, Swedish, Norwegian, Thai).
Revision history
| Date | Change | Summary |
|---|---|---|
| 2026-10-19 | minor | Indonesian interface catalog (id): every plain and formats message any catalog has, plus 69 command labels; What's New left in English |
| 2026-10-17 | minor | Finnish interface catalog (fi): 2,610 of 3,308 messages (2,313 plain + 297 formats), What's New left in English |
| 2026-10-15 | trivial | Italian (it): 339 interface messages and 60 format strings that were missing or still in English translated (2,628 of 3,278; only What's New left in English); native-speaker corrections: Exposure → Esposizione, Sharpening → Nitidezza, Preset → Preset, blurry → sfocate |
| 2026-10-13 | minor | Remeasured denominator (2,222 plain + 249 formats = 2,471); Vietnamese catalog complete at 2,471/2,471 (status partial: lower-layer errors still English) |
| 2026-10-12 | minor | Italian interface catalog (it): 2,201 of 2,398 messages, What's New left in English |
| 2026-10-11 | minor | Shared work: the interface decides on error kinds, not English error text (#1046) |
| 2026-10-12 | minor | Georgian (ka) row: every catalog message |
| 2026-10-10 | major | Created: per-language counts measured from the catalogs, the twelve key languages, script support, estimates |
| 2026-10-12 | minor | de, es, fr, ja and uk catalogs filled to every message another catalog knows (agent translations, native review welcome); those rows re-measured against the current 2,398 messages. Other rows keep their 2026-10-10 counts (open PRs for pt-BR, ru, zh) |
| 2026-10-16 | minor | German (de): 217 interface strings and 862 What's New lines added (agent translations, native review welcome); re-measured 2,572 → 3,644 of 3,754 messages (80% → 97%). The denominator grew because German now translates What's New lines no other catalog has; other rows keep their earlier counts |
| 2026-10-20 | minor | German (de) speaks to the user with du; the 11 messages that used Sie changed, no count changes |