[dmatviichuk]

DeckCraft currently displays its interface only in English. This adds Ukrainian across the ribbon, command palette, menus, panels, dialogs, tooltips, start screen, presenter controls, notices, empty-placeholder hints, and desktop/browser file picker labels.

Preferences now offers System language, English, and Українська. Ukrainian OS/browser locales select Ukrainian automatically; explicit desktop choices persist in ui.json. Command IDs, presentation content, custom layout prompts, file names, font names, and contributor identities retain their original values.

Closes #30. Related to #15.

• Add an English fallback and a 1,229-entry Ukrainian catalog at explicit UI boundaries, preserving placeholder names, order, and formatting.
• Handle Ukrainian integer counts, retain compatibility with existing preferences, and expose app.language for UI/control access.
• Use the existing openly licensed font fallback, with a regression covering every Cyrillic catalog character plus ҐґЄєІіЇї without system fonts.
• Add coverage for command/menu/gallery metadata and literal translation calls, plus document-preservation, locale, placeholder, and renderer/cache regressions.

Validation:

• cargo xtask ci passes all six gates: fmt, clippy, workspace tests, assets, layers, and WASM.
• cargo check -p deckcraft-web --target wasm32-unknown-unknown passes for the browser entry point.
• English/Ukrainian headless editor, Preferences, and Insert Table views were rendered and inspected locally. No new Markdown files or screenshots are included.
• VESUM Hunspell 6.8.6 checked 2,576 Cyrillic tokens (1,147 unique). Five flagged surface forms were reviewed: Git коміт inflections, supported by Ukrainian Pro Git, and typographic пт (пункт). Other flagged wording was corrected after ULIF dictionary and contextual review. Dictionary/checker data remains external and is not shipped.

As with existing web preferences, a manual browser language choice lasts for the current session. Uncatalogued engine diagnostics retain English fallback. Dictionary checks validate spelling and inflections; they do not certify every sentence's grammar or technical meaning.

[RicSchonfelder]

I added a Brazilian Portuguese catalog stacked on this work: #259 (draft).

It is based on this branch and adds only the pt-BR delta — crates/ui-egui/src/i18n/pt-br.tsv (1,232 rows, same English keys as uk.tsv), the Language::PtBr variant and the Portuguese count forms. The catalog/coverage tests now run against every catalog, so pt-BR is checked the same way as Ukrainian.

Once this PR lands, #259 should be rebased onto main and its diff becomes just the new language. Thanks for the catalog infrastructure — it made adding a language a small change.

[dmatviichuk]

@echelon @bflatastic can you take a look please

[brzuchal]

@dmatviichuk a heads-up from the Polish catalog stacked on this branch (#199). Today's main adds 40 labels that the catalog tests now require in every catalog:

• Unlock (canvas menu, Selection Pane Selection Pane: reorder by drag and drop, groups, Show/Hide All and Lock, as in PowerPoint (#133) #332)
• the IME commands Compose Text and Commit Composition (Korean, Japanese and Chinese: input-method composition and interface text (#101) #331)
• 37 new preset shape names (Gear: 6 Teeth, Callout: Bent Line with Accent Bar, …)

To get #199 green after merging main, I added both the Polish and the Ukrainian entries, appended at the end of each file in brzuchal@531c4e6. Feel free to take the uk.tsv lines when you merge main here.

I'm not a Ukrainian speaker. I followed the catalog's existing terms ("Виноска: …", "Стрілка: …", a capital letter after the colon, ліворуч/праворуч), but please correct anything that reads wrong. I'll carry your wording over to #199.

The same 40 keys will apply to the Brazilian Portuguese catalog in #259 (cc @RicSchonfelder).

On this machine ime_tests::cjk_text_in_the_interface_is_drawn_with_real_glyphs fails on plain main too: the 简体 glyphs are missing from the borrowed system font. So it is not caused by the catalogs.

[JaebeenAhn]

I added a Korean (ko / ko-KR) interface localization and CJK UI font fallback stacked on this work:

• Commit (7 files, clean delta on top of Add Ukrainian interface translation and language selection #34): JaebeenAhn@b32a78f
• Branch: https://github.com/JaebeenAhn/deckcraft/tree/i18n/korean
• Prebuilt Windows x64 Portable Release & Rendered Korean UI Screenshots: https://github.com/JaebeenAhn/deckcraft/releases/tag/v0.11.1-ko.1

What this adds

• crates/ui-egui/src/i18n/ko.tsv: 1,232 entries matching the exact key set and placeholder structure of uk.tsv, written from DeckCraft's English UI strings using standard Korean presentation terminology.
• crates/ui-egui/src/i18n.rs, lib.rs, dialogs.rs: Adds Language::Ko (한국어, code ko, locales ko, ko-KR, ko_KR.UTF-8), InterfaceLanguagePreference::Korean in Preferences ▸ Interface language, and Korean integer count formatting ({count}개).
• crates/ui-egui/src/theme.rs: Adds system Korean UI font fallback (Pretendard / Malgun Gothic on Windows, AppleGothic on macOS, NanumGothic on Linux) in install_fonts so Hangul syllables (U+AC00..U+D7A3) render cleanly in egui without missing-glyph boxes.
• ATTRIBUTION.md & docs/localization-parity.md: Adds attribution for ko.tsv and updates the twelve-key-languages table for Korean (ko).

Validation

• cargo test -p deckcraft-ui-egui i18n::tests -- --include-ignored — 7 passed, 0 failed (including catalog_is_unique_complete_and_preserves_placeholders, �ll_command_menu_and_gallery_labels_are_translated, every_literal_translation_call_has_a_catalog_entry, and headless preview rendering for ko-editor.png, ko-preferences.png, and ko-table.png).
• cargo build --release -p deckcraft -p deckcraft-cli — verified on Windows x64.

Once #34 lands in main, I am happy to open a standalone rebased PR (or feel free to cherry-pick �32a78ff10ee56c6197a6de27b34cd8b9aaa9d29 directly). Thanks @dmatviichuk for the clean localization architecture!