Swedish interface translation (sv)

Adds Swedish (Svenska) as an interface language: 2165 strings, written from the English source.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ROADMAP.md

@@ -111,7 +111,7 @@ native speakers' reviews of the six language drafts need people.
 | Korean | ko | 100% | draft (needs native review) |
 | Vietnamese | vi | 0% | none |
 
-No other languages. Figma ships English, Japanese, Korean, French, German, Spanish and Portuguese
+Also shipped: Swedish (`sv`, 100%, native review welcome). Figma ships English, Japanese, Korean, French, German, Spanish and Portuguese
 (Brazil); FigCraft has the localization layer, English and Spanish (Spain and Latin America),
 French, German, Brazilian Portuguese, Japanese, Korean and Simplified Chinese drafts (Preferences ▸
 Language; Traditional Chinese has no catalog; CJK UI

crates/ui-egui/src/i18n_tests.rs

@@ -6,7 +6,7 @@ use std::collections::BTreeSet;
 use super::*;
 
 /// Languages that must translate every UI string and command label.
-const COMPLETE: &[&str] = &["es"];
+const COMPLETE: &[&str] = &["es", "sv"];
 
 /// Keys looked up from data rather than written as `tr("…")` in the code: the main menu's
 /// submenu names (the engine's menu catalog) and labels of engine and document enums.
@@ -315,10 +315,23 @@ fn system_languages_pick_the_first_one_with_a_catalog() {
     // An OS list: the first language there is a catalog for (English counts).
     assert_eq!(code("system", Some("nl-NL,de-DE,en-US")), "de");
     assert_eq!(code("system", Some("nl-NL, en-US,fr-FR")), "en");
-    assert_eq!(code("system", Some("nl,sv")), "en");
+    assert_eq!(code("system", Some("nl,da")), "en");
+    assert_eq!(code("system", Some("nl,sv")), "sv");
     assert_eq!(code("fr", Some("de-DE")), "fr", "a chosen language beats the system's");
 }
 
+#[test]
+fn swedish_is_picked_for_swedish_locales() {
+    let code = |pref: &str, system: Option<&str>| LANGS[resolve(pref, system)].code;
+    for tag in ["sv", "sv-SE", "sv-FI", "sv_SE.UTF-8"] {
+        assert_eq!(code("system", Some(tag)), "sv", "{tag}");
+    }
+    let sv = LANGS.iter().position(|l| l.code == "sv").unwrap();
+    assert_eq!(LANGS[sv].name, "Svenska");
+    assert!(!LANGS[sv].draft);
+    assert!(!plural_one(sv, 0) && plural_one(sv, 1) && !plural_one(sv, 2));
+}
+
 #[test]
 fn latin_american_spanish_overlays_spanish() {
     let code = |pref: &str, system: Option<&str>| LANGS[resolve(pref, system)].code;

docs/localization-parity.md

@@ -29,7 +29,7 @@ supported by both apps (CJK, Arabic and Devanagari shaping, IME); Figma has no v
   and 29 menu wordings by command id: 1,982 entries. Command ids, the CLI, MCP and the control
   channel stay English. Accessibility names come from the same strings.
 - **Language preference:** Preferences ▸ Language (System, English, Deutsch, Español, Español
-  (Latinoamérica), Français, 日本語, 한국어, Português (Brasil), 简体中文), applied at once without a
+  (Latinoamérica), Français, 日本語, 한국어, Português (Brasil), Svenska, 简体中文), applied at once without a
   restart; System takes the first of the OS's preferred languages that has a catalog (Windows'
   language list, macOS AppleLanguages, `LANGUAGE` then the locale variables on Linux and BSD; a regional tag
   falls back to its language, pt-PT or pt to pt-BR, and es-419, es-MX, es-AR, es-CO and the other
@@ -91,7 +91,9 @@ supported by both apps (CJK, Arabic and Devanagari shaping, IME); Figma has no v
 | Korean | ko | 2,076 / 2,076 (100%, draft) | yes | Hangul text and IME in documents; UI text in an installed Korean face (web: the `FIGCRAFT_EMBED_CJK` build) | no | draft | 1–2 (after native review) |
 | Vietnamese | vi | 0 (0%) | no | Latin with stacked diacritics | no | none | 3–5 |
 
-Other languages: none shipped (Figma ships none beyond the eight above).
+Other languages: Swedish (`sv`), every UI string, command label and menu wording translated (a
+catalog test checks it stays complete); native review welcome. Figma ships none beyond the eight
+above.
 
 The layer is done. Per-language hours above are agent hours for a catalog of ~1,800 entries
 (a machine draft, then a pass over the panels for overflow), plus each language's plural rule where

docs/mcp.md

@@ -349,7 +349,7 @@ on; `key` resolves keys the way the canvas does. Commands behind keys:
   nested layers), Escape or a click drops it.
 - `pref.reduceMotion {on?}`: reduced motion (the interface's own animations off; the system's
   accessibility setting turns it on too). Prototype transitions still play.
-- `pref.language {language: system|en|es|es-419|fr|de|pt-BR|ja|ko|zh-Hans|…}`: the app's interface language, applied live ("system":
+- `pref.language {language: system|en|es|es-419|fr|de|pt-BR|ja|ko|sv|zh-Hans|…}`: the app's interface language, applied live ("system":
   the OS or browser language; a language without a catalog shows English). Command ids, labels and
   every result stay English.
 

docs/translating.md

@@ -14,7 +14,8 @@ Simplified.
 
 The catalogs: English (`en`, the source), and Spanish (`es`, with the Latin American overlay
 `es-419`), French (`fr`), German (`de`), Brazilian Portuguese (`pt-BR`), Japanese (`ja`), Korean (`ko`)
-and Simplified Chinese (`zh-Hans`), machine-drafted and waiting for native speakers' review.
+and Simplified Chinese (`zh-Hans`), machine-drafted and waiting for native speakers' review, and
+Swedish (`sv`), which translates every string.
 
 ## The catalogs