diff --git a/crates/ui-egui/src/i18n/ui.rs b/crates/ui-egui/src/i18n/ui.rs
index 4afb43b1..1a655bc4 100644
--- a/crates/ui-egui/src/i18n/ui.rs
+++ b/crates/ui-egui/src/i18n/ui.rs
@@ -129,7 +129,7 @@ const SIMPLIFIED_CHINESE: &[(&str, &str)] = &[
     ("Casts Shadows", "投射阴影"),
     ("Change Renderer…", "更改渲染器…"),
     ("Changing a shortcut creates a custom preset; the default stays as it is.", "修改快捷键会创建自定义预设；默认预设保持不变。"),
-    ("Channel", "色版"),
+    ("Channel", "通道"),
     ("Channel:", "通道："),
     ("Chapter:", "章节："),
     ("Choose...", "选择..."),
@@ -285,7 +285,7 @@ const SIMPLIFIED_CHINESE: &[(&str, &str)] = &[
     ("More ArtCraft apps", "更多 ArtCraft 应用"),
     ("More tutorials", "更多教程"),
     ("Motion Blur", "运动模糊"),
-    ("Motion Blur: {}", "动态模糊：{}"),
+    ("Motion Blur: {}", "运动模糊：{}"),
     ("Motion Sketch: drag to record", "动态草图：拖动以记录"),
     ("Move Down", "下移"),
     ("Move Up", "上移"),
@@ -490,6 +490,64 @@ const SIMPLIFIED_CHINESE: &[(&str, &str)] = &[
     ("⌘/Ctrl-drag a pin to record its motion", "⌘/Ctrl 拖动定位点可记录其运动"),
     ("▣ {}", "▣ {}"),
     ("⚠ {} is used by:", "⚠ {} 已被以下项目使用："),
+    // Strings a panel used to hand to a helper as a bare literal: the helper draws them (the
+    // viewer's toolbar tooltips and popup items, the solid dialog's checkbox), so the lookup has
+    // to reach the catalog from inside the helper. Kept at the end so the catalogs stay parallel.
+    ("3D Reference Axes", "3D 参考轴"),
+    ("Affect all layers that use this solid", "影响使用该纯色的所有图层"),
+    ("Choose grid and guide options", "选择网格和参考线选项"),
+    ("Colorize", "着色"),
+    ("Custom", "自定义"),
+    ("Custom...", "自定义…"),
+    ("Fit", "适合"),
+    ("Fit up to 100%", "适合（最大 100%）"),
+    ("Full", "完整"),
+    ("Half", "一半"),
+    ("Only this layer uses this solid.", "仅此图层使用该纯色。"),
+    ("Proportional Grid", "比例网格"),
+    ("Quarter", "四分之一"),
+    ("Region of Interest", "目标区域"),
+    ("Reset Exposure", "重置曝光"),
+    ("Show Channel and Color Management Settings", "显示通道和色彩管理设置"),
+    ("Show Snapshot (hold)", "显示快照（按住）"),
+    ("Take Snapshot", "拍摄快照"),
+    ("Third", "三分之一"),
+    ("Toggle Mask and Shape Path Visibility", "切换蒙版与形状路径可见性"),
+    ("Toggle Transparency Grid", "切换透明网格"),
+    // Technical terms and proper nouns: the project settings, the import and export forms, the
+    // viewer's channel and Fast Previews popups, the keyframe dialogs and the About window. The
+    // terms that are the same in Chinese (Display P3, HDTV (Rec. 709), RGB, Alpha, H.264, ProRes…)
+    // need no row: a missing row falls back to the English source, which is the decision.
+    ("16 bits per channel", "每通道 16 位"),
+    ("32 bits per channel (float)", "每通道 32 位（浮点）"),
+    ("8 bits per channel", "每通道 8 位"),
+    ("Adaptive Resolution", "自适应分辨率"),
+    ("Adobe-style built-in", "Adobe 风格内置"),
+    ("Blue", "蓝色"),
+    ("Current Settings", "当前设置"),
+    ("Disable Per-character 3D", "停用逐字 3D 化"),
+    ("Draft", "草图"),
+    ("Enable Per-character 3D", "启用逐字 3D 化"),
+    ("Fast Draft", "快速草图"),
+    ("Fast Previews (Draft 3D, Faster Effects)", "快速预览（3D 草图、更快效果）"),
+    ("Green", "绿色"),
+    ("Import Image Sequence", "导入图像序列"),
+    ("Import PDF / Illustrator File", "导入 PDF / Illustrator 文件"),
+    ("Import Photoshop File", "导入 Photoshop 文件"),
+    ("Interpret Unlabeled Alpha As", "将未标记的 Alpha 解释为"),
+    ("Join the ArtCraft Discord", "加入 ArtCraft Discord"),
+    ("Mercury GPU Acceleration ({})", "Mercury GPU 加速（{}）"),
+    ("Mercury Software Only", "仅 Mercury 软件"),
+    ("OCIO (built-in ACES config)", "OCIO（内置 ACES 配置）"),
+    ("Off (Final Quality)", "关闭（最终质量）"),
+    ("OpenGL (compatibility)", "OpenGL（兼容）"),
+    ("Opus Bitrate: {} kbps", "Opus 比特率：{} kbps"),
+    ("RGB Straight", "RGB 直接"),
+    ("Red", "红色"),
+    ("Tone map", "色调映射"),
+    ("Use In-Window Menu Bar on macOS", "在 macOS 上使用窗口内菜单栏"),
+    ("Wireframe", "线框"),
+    ("sRGB IEC61966-2.1 (default)", "sRGB IEC61966-2.1（默认）"),
 ];
 
 const TRADITIONAL_CHINESE: &[(&str, &str)] = &[
@@ -907,6 +965,61 @@ const TRADITIONAL_CHINESE: &[(&str, &str)] = &[
     ("⌘/Ctrl-drag a pin to record its motion", "⌘/Ctrl 拖曳釘選點可記錄其運動"),
     ("▣ {}", "▣ {}"),
     ("⚠ {} is used by:", "⚠ {} 已被以下專案使用："),
+    // The same rows as the Simplified catalog (the tests require both lists to match). The
+    // Traditional wording is the translator's call and is left as the English source for now.
+    ("3D Reference Axes", "3D Reference Axes"),
+    ("Affect all layers that use this solid", "Affect all layers that use this solid"),
+    ("Choose grid and guide options", "Choose grid and guide options"),
+    ("Colorize", "Colorize"),
+    ("Custom", "Custom"),
+    ("Custom...", "Custom..."),
+    ("Fit", "Fit"),
+    ("Fit up to 100%", "Fit up to 100%"),
+    ("Full", "Full"),
+    ("Half", "Half"),
+    ("Only this layer uses this solid.", "Only this layer uses this solid."),
+    ("Proportional Grid", "Proportional Grid"),
+    ("Quarter", "Quarter"),
+    ("Region of Interest", "Region of Interest"),
+    ("Reset Exposure", "Reset Exposure"),
+    ("Show Channel and Color Management Settings", "Show Channel and Color Management Settings"),
+    ("Show Snapshot (hold)", "Show Snapshot (hold)"),
+    ("Take Snapshot", "Take Snapshot"),
+    ("Third", "Third"),
+    ("Toggle Mask and Shape Path Visibility", "Toggle Mask and Shape Path Visibility"),
+    ("Toggle Transparency Grid", "Toggle Transparency Grid"),
+    // The same rows as the Simplified catalog (the tests require both lists to match). The
+    // Traditional wording is the translator's call and stays the English source until then.
+    ("16 bits per channel", "16 bits per channel"),
+    ("32 bits per channel (float)", "32 bits per channel (float)"),
+    ("8 bits per channel", "8 bits per channel"),
+    ("Adaptive Resolution", "Adaptive Resolution"),
+    ("Adobe-style built-in", "Adobe-style built-in"),
+    ("Blue", "Blue"),
+    ("Current Settings", "Current Settings"),
+    ("Disable Per-character 3D", "Disable Per-character 3D"),
+    ("Draft", "Draft"),
+    ("Enable Per-character 3D", "Enable Per-character 3D"),
+    ("Fast Draft", "Fast Draft"),
+    ("Fast Previews (Draft 3D, Faster Effects)", "Fast Previews (Draft 3D, Faster Effects)"),
+    ("Green", "Green"),
+    ("Import Image Sequence", "Import Image Sequence"),
+    ("Import PDF / Illustrator File", "Import PDF / Illustrator File"),
+    ("Import Photoshop File", "Import Photoshop File"),
+    ("Interpret Unlabeled Alpha As", "Interpret Unlabeled Alpha As"),
+    ("Join the ArtCraft Discord", "Join the ArtCraft Discord"),
+    ("Mercury GPU Acceleration ({})", "Mercury GPU Acceleration ({})"),
+    ("Mercury Software Only", "Mercury Software Only"),
+    ("OCIO (built-in ACES config)", "OCIO (built-in ACES config)"),
+    ("Off (Final Quality)", "Off (Final Quality)"),
+    ("OpenGL (compatibility)", "OpenGL (compatibility)"),
+    ("Opus Bitrate: {} kbps", "Opus Bitrate: {} kbps"),
+    ("RGB Straight", "RGB Straight"),
+    ("Red", "Red"),
+    ("Tone map", "Tone map"),
+    ("Use In-Window Menu Bar on macOS", "Use In-Window Menu Bar on macOS"),
+    ("Wireframe", "Wireframe"),
+    ("sRGB IEC61966-2.1 (default)", "sRGB IEC61966-2.1 (default)"),
 ];
 
 #[cfg(test)]
@@ -965,6 +1078,12 @@ mod tests {
         ("panels/viewer.rs", include_str!("../panels/viewer.rs")),
         ("panels/viewer_tools.rs", include_str!("../panels/viewer_tools.rs")),
         ("panels/viewers.rs", include_str!("../panels/viewers.rs")),
+        // Text the interface draws but does not own: the settings pages and the viewer's channel
+        // and Fast Previews lists come from the engine as data, so their source strings live here.
+        // Both files pass the literal scan below unchanged (they hold no drawn literals).
+        ("engine settings pages", include_str!("../../../engine/src/prefs.rs")),
+        ("engine viewer channels", include_str!("../../../engine/src/viewer.rs")),
+        ("engine viewer commands", include_str!("../../../engine/src/commands/viewer_cmds.rs")),
     ];
 
     /// Call shapes that hand a string literal straight to the user.
@@ -976,6 +1095,7 @@ mod tests {
         ".heading(\"",
         ".monospace(\"",
         ".on_hover_text(\"",
+        ".on_disabled_hover_text(\"",
         ".hint_text(\"",
         ".text(\"",
         ".prefix(\"",
@@ -1039,19 +1159,44 @@ mod tests {
     }
 
     /// Every row is asked for by a converted panel: a leftover row means the panel went back to its
-    /// English literal.
+    /// English literal. A string a helper draws for the panel (a toolbar tooltip, a popup item, a
+    /// checkbox label) is looked up inside that helper, so its English source only appears as a
+    /// literal there - `helper_labels_are_translated` keeps those helpers honest.
     #[test]
     fn every_row_is_used_by_a_converted_panel() {
         for (en, _) in catalogs() {
             let plain = format!("tr({en:?})");
             let formatted = format!("tr_args({en:?}");
+            let bare = format!("{en:?}");
             assert!(
-                CONVERTED.iter().any(|(_, src)| src.contains(&plain) || src.contains(&formatted)),
+                CONVERTED.iter().any(|(_, src)| src.contains(&plain) || src.contains(&formatted) || src.contains(&bare)),
                 "{en:?} is in the catalog but no converted panel asks for it"
             );
         }
     }
 
+    /// A label that a helper takes as an argument is drawn by the helper, so the helper has to ask
+    /// the catalog: `Checkbox::new` and `RadioButton::new` are not among the scanned call shapes
+    /// (the label is their second argument), which let the solid dialog's checkbox ship in English.
+    #[test]
+    fn helper_labels_are_translated() {
+        for (path, source) in CONVERTED {
+            for marker in ["Checkbox::new(", "RadioButton::new("] {
+                let mut from = 0;
+                while let Some(at) = source[from..].find(marker) {
+                    let at = from + at;
+                    let rest = &source[at + marker.len()..];
+                    let line = &rest[..rest.find('\n').unwrap_or(rest.len())];
+                    if let Some(q) = line.find('"') {
+                        let before = line[..q].trim_end();
+                        assert!(before.ends_with("tr("), "{path}: the `{marker}` label `{}` is not in the catalog", &line[q..]);
+                    }
+                    from = at + marker.len();
+                }
+            }
+        }
+    }
+
     /// A newly hard-coded interface string fails here instead of shipping in English to every
     /// language. It is a heuristic - it looks at the call shapes the panels use - and it ignores
     /// one-character literals, which are punctuation or a key name rather than a sentence.
diff --git a/crates/ui-egui/src/panels/comp_settings.rs b/crates/ui-egui/src/panels/comp_settings.rs
index 39b7580e..b18e4c8d 100644
--- a/crates/ui-egui/src/panels/comp_settings.rs
+++ b/crates/ui-egui/src/panels/comp_settings.rs
@@ -340,11 +340,13 @@ pub fn show(ui: &mut egui::Ui, d: &mut CompDraft, t: &Tokens, auto: &mut Registr
         Tab::Renderer => {
             ui.horizontal(|ui| {
                 ui.label(tr("Renderer:"));
-                let r =
-                    egui::ComboBox::from_id_salt("comp-renderer").selected_text(if d.advanced_3d { "Advanced 3D" } else { "Classic 3D" }).show_ui(ui, |ui| {
+                let r = egui::ComboBox::from_id_salt("comp-renderer").selected_text(tr(if d.advanced_3d { "Advanced 3D" } else { "Classic 3D" })).show_ui(
+                    ui,
+                    |ui| {
                         ui.selectable_value(&mut d.advanced_3d, false, tr("Classic 3D"));
                         ui.selectable_value(&mut d.advanced_3d, true, tr("Advanced 3D"));
-                    });
+                    },
+                );
                 auto.add("dialog.comp.renderer", r.response.rect, "Renderer");
             });
         }
diff --git a/crates/ui-egui/src/panels/dialogs.rs b/crates/ui-egui/src/panels/dialogs.rs
index f123906b..08e7c302 100644
--- a/crates/ui-egui/src/panels/dialogs.rs
+++ b/crates/ui-egui/src/panels/dialogs.rs
@@ -158,7 +158,8 @@ pub(crate) fn modal(ctx: &egui::Context, title: &str, size: egui::Vec2, t: &Toke
         .show(ctx, |ui| {
             ui.set_width(size.x - 36.0);
             ui.set_min_height(size.y - 36.0);
-            ui.label(egui::RichText::new(title).font(Tokens::semibold(15.0)).color(t.tab_text_active));
+            // The id stays keyed on the untranslated source, so switching language cannot move it.
+            ui.label(egui::RichText::new(tr(title)).font(Tokens::semibold(15.0)).color(t.tab_text_active));
             ui.add_space(10.0);
             egui::ScrollArea::both().max_height((available.y - 84.0).max(40.0)).auto_shrink([false, true]).show(ui, body);
         });
@@ -291,7 +292,7 @@ fn about_main(app: &mut EffectcraftApp, ui: &mut egui::Ui, t: &Tokens, cmd: &mut
         );
         let foreground = if discord { Color32::WHITE } else { t.text };
         icons::paint(p, Rect::from_center_size(pos2(r.min.x + 18.0, r.center().y), vec2(15.0, 15.0)), icon, foreground);
-        p.text(pos2(r.min.x + 36.0, r.center().y), Align2::LEFT_CENTER, label, Tokens::medium(12.5), foreground);
+        p.text(pos2(r.min.x + 36.0, r.center().y), Align2::LEFT_CENTER, tr(label), Tokens::medium(12.5), foreground);
         p.text(
             pos2(r.max.x - 12.0, r.center().y),
             Align2::RIGHT_CENTER,
@@ -418,8 +419,8 @@ fn solid(app: &mut EffectcraftApp, ctx: &egui::Context, t: &Tokens) {
         if editing.is_some() {
             ui.add_space(8.0);
             let r = ui
-                .add_enabled(shared, egui::Checkbox::new(&mut affect_all, "Affect all layers that use this solid"))
-                .on_disabled_hover_text("Only this layer uses this solid.");
+                .add_enabled(shared, egui::Checkbox::new(&mut affect_all, tr("Affect all layers that use this solid")))
+                .on_disabled_hover_text(tr("Only this layer uses this solid."));
             auto.add("dialog.solid.affectAll", r.rect, "Affect all layers that use this solid");
             if shared && !affect_all {
                 ui.label(egui::RichText::new(tr("This change will create a new solid for this layer.")).color(t.text_dim).size(11.0));
diff --git a/crates/ui-egui/src/panels/forms.rs b/crates/ui-egui/src/panels/forms.rs
index 117c95fb..c7f330b0 100644
--- a/crates/ui-egui/src/panels/forms.rs
+++ b/crates/ui-egui/src/panels/forms.rs
@@ -4,7 +4,7 @@
 //! Keyboard Shortcuts: `shortcut_editor`). Every form runs an engine command with the collected parameters, so whatever a
 //! dialog does an agent can do with one `engine.execute`.
 
-use crate::i18n::tr;
+use crate::i18n::{tr, tr_args};
 use egui::{Color32, vec2};
 use serde_json::{Map, Value, json};
 
@@ -487,9 +487,11 @@ pub fn open_form(app: &mut EffectcraftApp, id: &str, p: &Value) -> bool {
         }
         "file.projectSettings" if p.as_object().is_none_or(|m| m.is_empty()) => {
             let st = &s.project.settings;
+            // The catalogue row is `Mercury GPU Acceleration ({})`, so the value goes through
+            // tr_args: wrapping the assembled string in tr() would look up the backend's name.
             let gpu_label = match &s.accel {
-                Some(a) => format!("Mercury GPU Acceleration ({})", a.name()),
-                None => "Mercury GPU Acceleration (no GPU: software)".to_string(),
+                Some(a) => tr_args("Mercury GPU Acceleration ({})", &[&a.name()]),
+                None => tr("Mercury GPU Acceleration (no GPU: software)").to_string(),
             };
             let depth = match st.bit_depth.label() {
                 l if l.starts_with("16") => 1,
@@ -765,7 +767,7 @@ pub fn show_form(app: &mut EffectcraftApp, ctx: &egui::Context, t: &Tokens) {
     super::dialogs::modal(ctx, &f.title.clone(), vec2(480.0, h), t, |ui| {
         egui::Grid::new("form-grid").num_columns(2).spacing([14.0, 10.0]).show(ui, |ui| {
             for (i, fl) in f.fields.iter_mut().enumerate() {
-                ui.label(&fl.label);
+                ui.label(tr(&fl.label));
                 let r = match &mut fl.kind {
                     FieldKind::Number { value, speed } => {
                         let dec = if *speed < 0.01 { 5 } else { 3 };
@@ -801,7 +803,7 @@ pub fn show_form(app: &mut EffectcraftApp, ctx: &egui::Context, t: &Tokens) {
                     FieldKind::Note(text) => {
                         ui.scope(|ui| {
                             ui.set_width(220.0);
-                            ui.add(egui::Label::new(egui::RichText::new(text.as_str()).small()).wrap())
+                            ui.add(egui::Label::new(egui::RichText::new(tr(text.as_str())).small()).wrap())
                         })
                         .inner
                         .rect
@@ -810,11 +812,11 @@ pub fn show_form(app: &mut EffectcraftApp, ctx: &egui::Context, t: &Tokens) {
                     FieldKind::Choice { options, sel } => {
                         let cur = options.get(*sel).map(|o| o.0.clone()).unwrap_or_default();
                         egui::ComboBox::from_id_salt(("form", fl.key.as_str()))
-                            .selected_text(cur)
+                            .selected_text(tr(&cur))
                             .width(240.0)
                             .show_ui(ui, |ui| {
                                 for (i, (l, _)) in options.iter().enumerate() {
-                                    ui.selectable_value(sel, i, l);
+                                    ui.selectable_value(sel, i, tr(l));
                                 }
                             })
                             .response
@@ -888,7 +890,7 @@ pub fn show_info(app: &mut EffectcraftApp, ctx: &egui::Context, t: &Tokens) {
     let (title, body) = app.dialog_state.info.clone();
     let mut close = false;
     super::dialogs::modal(ctx, &title, vec2(440.0, 160.0), t, |ui| {
-        ui.label(body);
+        ui.label(tr(&body));
         ui.add_space(16.0);
         ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
             if ui.add(egui::Button::new(egui::RichText::new(tr("   OK   ")).color(Color32::WHITE)).fill(t.accent)).clicked() {
diff --git a/crates/ui-egui/src/panels/key_dialogs.rs b/crates/ui-egui/src/panels/key_dialogs.rs
index 3e170c12..6e1c5d4c 100644
--- a/crates/ui-egui/src/panels/key_dialogs.rs
+++ b/crates/ui-egui/src/panels/key_dialogs.rs
@@ -190,9 +190,10 @@ pub fn velocity(app: &mut EffectcraftApp, ctx: &egui::Context, t: &Tokens) {
 
 fn combo(ui: &mut egui::Ui, app: &mut EffectcraftApp, id: &str, sel: &mut usize, opts: &[&str], enabled: bool) {
     ui.add_enabled_ui(enabled, |ui| {
-        let r = egui::ComboBox::from_id_salt(id).width(200.0).selected_text(opts[*sel]).show_ui(ui, |ui| {
+        // The options are the English source strings; the automation id and label stay English.
+        let r = egui::ComboBox::from_id_salt(id).width(200.0).selected_text(tr(opts[*sel])).show_ui(ui, |ui| {
             for (i, o) in opts.iter().enumerate() {
-                ui.selectable_value(sel, i, *o);
+                ui.selectable_value(sel, i, tr(o));
             }
         });
         app.auto.add(id, r.response.rect, id);
diff --git a/crates/ui-egui/src/panels/properties.rs b/crates/ui-egui/src/panels/properties.rs
index 2dcecc1d..9e78ffbc 100644
--- a/crates/ui-egui/src/panels/properties.rs
+++ b/crates/ui-egui/src/panels/properties.rs
@@ -15,6 +15,7 @@ use egui::{Align2, Color32, Rect, Sense, Stroke, pos2, vec2};
 use serde_json::json;
 
 use crate::dock::PanelKind;
+use crate::i18n::tr;
 use crate::icons::{self, Icon};
 use crate::theme::Tokens;
 use crate::{EffectcraftApp, widgets};
@@ -120,7 +121,8 @@ pub fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, rect: Rect) {
         }
         let per_char = layer.props.prop("text/perChar3d").is_some_and(|q| q.value.as_bool());
         let entries = animator_entries(per_char);
-        let labels: Vec<String> = entries.iter().map(|(l, _)| l.clone()).collect();
+        // The entries are the English source strings; the menu draws them translated.
+        let labels: Vec<String> = entries.iter().map(|(l, _)| tr(l).to_string()).collect();
         if let Some(i) = widgets::popup_menu(ui, pop, br.left_bottom(), &labels, None) {
             match entries[i].1 {
                 "" => {}
diff --git a/crates/ui-egui/src/panels/render_queue.rs b/crates/ui-egui/src/panels/render_queue.rs
index 583c800b..502b8410 100644
--- a/crates/ui-egui/src/panels/render_queue.rs
+++ b/crates/ui-egui/src/panels/render_queue.rs
@@ -183,7 +183,7 @@ fn output_menu(it: &RenderQueueItem, available: &[OutputFormat], templates: &Ren
             }
             v.push(("-".into(), Value::Null));
             for kbps in [24u32, 32, 64, 96, 128, 192, 256] {
-                v.push((mark(o.opus_bitrate_kbps == kbps, &format!("Opus Bitrate: {kbps} kbps")), json!({"audioBitrate": kbps})));
+                v.push((mark(o.opus_bitrate_kbps == kbps, &tr_args("Opus Bitrate: {} kbps", &[&kbps])), json!({"audioBitrate": kbps})));
             }
             for (a, k) in [(OpusApplication::Audio, "audio"), (OpusApplication::Voip, "voice")] {
                 v.push((mark(o.opus_application == a, &tr_args("Opus Tuning: {}", &[&(a.label())])), json!({"opusApplication": k})));
diff --git a/crates/ui-egui/src/panels/settings.rs b/crates/ui-egui/src/panels/settings.rs
index ac79d8f0..6e3335b5 100644
--- a/crates/ui-egui/src/panels/settings.rs
+++ b/crates/ui-egui/src/panels/settings.rs
@@ -50,14 +50,14 @@ fn page_ui(app: &mut EffectcraftApp, ui: &mut egui::Ui, page: &Page, cur: &Value
         match *item {
             Item::Section(title) => {
                 ui.add_space(6.0);
-                ui.label(RichText::new(title).font(Tokens::semibold(12.5)).color(t.tab_text_active));
+                ui.label(RichText::new(tr(title)).font(Tokens::semibold(12.5)).color(t.tab_text_active));
                 ui.separator();
             }
             Item::Note(text) => {
-                ui.label(RichText::new(text).color(t.text_dim));
+                ui.label(RichText::new(tr(text)).color(t.text_dim));
             }
             Item::Button { label, command, params } => {
-                let r = ui.button(label);
+                let r = ui.button(tr(label));
                 reg(app, &format!("settings.button.{}", label.trim_end_matches('.')), &r, label);
                 if r.clicked() {
                     acts.push(Act::Run(command.into(), serde_json::from_str(params).unwrap_or(json!({}))));
@@ -96,7 +96,7 @@ fn page_ui(app: &mut EffectcraftApp, ui: &mut egui::Ui, page: &Page, cur: &Value
                 match kind {
                     Kind::Bool => {
                         let mut b = v.as_bool().unwrap_or(false);
-                        let r = ui.checkbox(&mut b, label);
+                        let r = ui.checkbox(&mut b, tr(label));
                         if r.changed() {
                             acts.push(Act::Set(key.into(), json!(b)));
                         }
@@ -104,7 +104,7 @@ fn page_ui(app: &mut EffectcraftApp, ui: &mut egui::Ui, page: &Page, cur: &Value
                     }
                     _ => {
                         ui.horizontal(|ui| {
-                            ui.add_sized(vec2(label_w, 18.0), egui::Label::new(format!("{label}:")).truncate());
+                            ui.add_sized(vec2(label_w, 18.0), egui::Label::new(format!("{}:", tr(label))).truncate());
                             let r = match kind {
                                 Kind::Int(lo, hi, unit) => {
                                     let mut x = v.as_i64().unwrap_or(0);
@@ -146,11 +146,11 @@ fn page_ui(app: &mut EffectcraftApp, ui: &mut egui::Ui, page: &Page, cur: &Value
                                     let curv = v.as_str().map_or_else(|| v.to_string(), str::to_string);
                                     let shown = opts.iter().find(|o| o.1 == curv).map(|o| o.0).unwrap_or(curv.as_str()).to_string();
                                     egui::ComboBox::from_id_salt(("settings", key))
-                                        .selected_text(shown)
+                                        .selected_text(tr(&shown))
                                         .width(220.0)
                                         .show_ui(ui, |ui| {
                                             for (l, val) in opts {
-                                                if ui.selectable_label(*val == curv, *l).clicked() {
+                                                if ui.selectable_label(*val == curv, tr(l)).clicked() {
                                                     acts.push(Act::Set(key.into(), json!(val)));
                                                 }
                                             }
@@ -449,7 +449,7 @@ pub fn show(app: &mut EffectcraftApp, ctx: &egui::Context, t: &Tokens) {
                         ui.painter().text(
                             r.left_center() + vec2(10.0, 0.0),
                             egui::Align2::LEFT_CENTER,
-                            p.title,
+                            tr(p.title),
                             Tokens::ui(12.5),
                             if sel { Color32::WHITE } else { t.text },
                         );
@@ -466,7 +466,7 @@ pub fn show(app: &mut EffectcraftApp, ctx: &egui::Context, t: &Tokens) {
                 // dialog scrolled sideways a little (#284).
                 ui.set_width(ui.available_width());
                 let p = &all[idx];
-                ui.label(RichText::new(p.title).font(Tokens::semibold(14.0)).color(t.tab_text_active));
+                ui.label(RichText::new(tr(p.title)).font(Tokens::semibold(14.0)).color(t.tab_text_active));
                 ui.add_space(6.0);
                 egui::ScrollArea::vertical().max_height(body_h - 30.0).auto_shrink([false, false]).show(ui, |ui| {
                     page_ui(app, ui, p, &cur, t, &mut acts);
diff --git a/crates/ui-egui/src/panels/timeline.rs b/crates/ui-egui/src/panels/timeline.rs
index 1d61ae4c..7df3439b 100644
--- a/crates/ui-egui/src/panels/timeline.rs
+++ b/crates/ui-egui/src/panels/timeline.rs
@@ -14,6 +14,7 @@ use effectcraft_engine::time::Tick;
 use egui::{Align2, Color32, Pos2, Rect, Sense, Stroke, StrokeKind, pos2, vec2};
 use serde_json::json;
 
+use crate::i18n::tr;
 use crate::icons::{self, Icon};
 use crate::theme::Tokens;
 use crate::{EffectcraftApp, widgets};
@@ -3280,7 +3281,7 @@ fn text_anim_popups(
     let mut opts: Vec<String> = Vec::new();
     let mut acts: Vec<(String, serde_json::Value)> = Vec::new();
     if key == "animate" {
-        opts.push(if per_char { "Disable Per-character 3D" } else { "Enable Per-character 3D" }.into());
+        opts.push(tr(if per_char { "Disable Per-character 3D" } else { "Enable Per-character 3D" }).to_string());
         acts.push(("layer.enablePerChar3D".into(), json!({"layer": layer.id.0, "enabled": !per_char})));
         opts.push("-".into());
         acts.push((String::new(), json!(null)));
diff --git a/crates/ui-egui/src/panels/viewer_tools.rs b/crates/ui-egui/src/panels/viewer_tools.rs
index 8d41eb73..2161a030 100644
--- a/crates/ui-egui/src/panels/viewer_tools.rs
+++ b/crates/ui-egui/src/panels/viewer_tools.rs
@@ -486,7 +486,9 @@ fn popup(app: &mut EffectcraftApp, ui: &mut egui::Ui, id: &str, anchor: Rect, it
                 ui.separator();
                 continue;
             }
-            let r = ui.selectable_label(*on, label.as_str());
+            // The item is the English source: the drawn text is looked up in the catalog, while
+            // the automation label stays English for scripts and tests.
+            let r = ui.selectable_label(*on, crate::i18n::tr(label));
             app.auto.add(&format!("viewer.{auto}.{i}"), r.rect, label);
             if r.clicked() {
                 chosen = Some(i);
@@ -520,10 +522,10 @@ pub(crate) fn resolution_label(res: Resolution, scale: f64) -> String {
             } else {
                 "Quarter"
             };
-            format!("({r})")
+            format!("({})", crate::i18n::tr(r))
         }
-        Resolution::Custom(n) => format!("Custom ({n})"),
-        r => r.label().to_string(),
+        Resolution::Custom(n) => format!("{} ({n})", crate::i18n::tr("Custom")),
+        r => crate::i18n::tr(r.label()).to_string(),
     }
 }
 
@@ -602,7 +604,9 @@ pub(crate) fn bottom_bar(app: &mut EffectcraftApp, ui: &mut egui::Ui, bar: Rect,
 
     let tog = |ui: &mut egui::Ui, auto: &mut crate::automation::Registry, x: &mut f32, icon: Icon, on: bool, id: &str, tip: &str| -> (bool, Rect) {
         let r = Rect::from_min_size(pos2(*x, cy - 11.0), vec2(22.0, 22.0));
-        let resp = widgets::icon_button(ui, r, icon, on, &t, egui::Id::new(("vw-btn", id))).on_hover_text(tip);
+        // The tip is the English source: the tooltip is looked up in the catalog, while the
+        // automation label stays English for scripts and tests.
+        let resp = widgets::icon_button(ui, r, icon, on, &t, egui::Id::new(("vw-btn", id))).on_hover_text(crate::i18n::tr(tip));
         auto.add(&format!("viewer.{id}"), r, tip);
         *x += 24.0;
         (resp.clicked(), r)
@@ -632,7 +636,7 @@ pub(crate) fn bottom_bar(app: &mut EffectcraftApp, ui: &mut egui::Ui, bar: Rect,
     }
     let v = &app.ui.viewer;
     let items = vec![
-        ("Title/Action Safe".to_string(), v.safe_margins),
+        ("Title/action safe".to_string(), v.safe_margins),
         ("Proportional Grid".to_string(), v.proportional_grid),
         ("Grid".to_string(), v.grid),
         ("Guides".to_string(), v.guides),