diff --git a/crates/ui-egui/src/i18n/es.rs b/crates/ui-egui/src/i18n/es.rs
index 372ef1d..6812cb4 100644
--- a/crates/ui-egui/src/i18n/es.rs
+++ b/crates/ui-egui/src/i18n/es.rs
@@ -409,6 +409,36 @@ pub(super) fn translate(text: &str) -> Option<&'static str> {
         "Dark" => "Oscuro",
         "Sheet Options|View" => "Ver",
         "Print" => "Imprimir",
+        "PivotTable Fields" => "Campos de tabla dinámica",
+        "Choose fields to add to report:" => "Seleccione los campos para agregar al informe:",
+        "Use a field's menu to move it between areas:" => "Use el menú de un campo para moverlo entre áreas:",
+        "Filters" => "Filtros",
+        "Columns" => "Columnas",
+        "Rows" => "Filas",
+        "Values" => "Valores",
+        "Move to Row Labels" => "Mover a rótulos de fila",
+        "Move to Column Labels" => "Mover a rótulos de columna",
+        "Move to Report Filter" => "Mover al filtro de informe",
+        "Move to Values" => "Mover a valores",
+        "Summarize by Sum" => "Resumir por suma",
+        "Summarize by Count" => "Resumir por cuenta",
+        "Summarize by Average" => "Resumir por promedio",
+        "Summarize by Max" => "Resumir por máximo",
+        "Summarize by Min" => "Resumir por mínimo",
+        "Show as No Calculation" => "Mostrar como sin cálculo",
+        "Show as % of Grand Total" => "Mostrar como % del total general",
+        "Show as Running Total" => "Mostrar como total acumulado",
+        "Show as Rank" => "Mostrar como clasificación",
+        "Group by Years" => "Agrupar por años",
+        "Group by Quarters" => "Agrupar por trimestres",
+        "Group by Months" => "Agrupar por meses",
+        "Remove Field" => "Quitar campo",
+        "Refresh" => "Actualizar",
+        "Calculated Field…" => "Campo calculado…",
+        "Report Layout" => "Diseño de informe",
+        "Compact" => "Compacto",
+        "Outline" => "Esquema",
+        "Tabular" => "Tabular",
         _ => return None,
     })
 }
diff --git a/crates/ui-egui/src/pivot_pane.rs b/crates/ui-egui/src/pivot_pane.rs
index 0657026..55917ef 100644
--- a/crates/ui-egui/src/pivot_pane.rs
+++ b/crates/ui-egui/src/pivot_pane.rs
@@ -6,6 +6,7 @@ use egui::{Color32, Ui, vec2};
 use serde_json::{Value as Json, json};
 
 use crate::SheetApp;
+use crate::i18n;
 use crate::theme::{self, Tokens};
 
 /// Whether the active cell is inside a pivot report (so the pane should show).
@@ -19,13 +20,14 @@ pub fn active_pivot(app: &SheetApp) -> Option<String> {
 pub fn show(app: &mut SheetApp, ui: &mut Ui) {
     let Some(name) = active_pivot(app) else { return };
     let t = Tokens::get(ui.ctx());
+    let lang = i18n::current(ui.ctx());
     let info = match app.session.run("pivot.fields", json!({"pivot": name})) {
         Ok(v) => v,
         Err(_) => return,
     };
     egui::Panel::right("pivot_pane").default_size(280.0).resizable(true).frame(egui::Frame::NONE.fill(t.ribbon).inner_margin(10)).show(ui, |ui| {
-        ui.label(egui::RichText::new("PivotTable Fields").font(theme::ui_bold(15.0)));
-        ui.label(egui::RichText::new("Choose fields to add to report:").small().color(t.text_dim));
+        ui.label(egui::RichText::new(lang.tr("PivotTable Fields")).font(theme::ui_bold(15.0)));
+        ui.label(egui::RichText::new(lang.tr("Choose fields to add to report:")).small().color(t.text_dim));
         ui.add_space(4.0);
         let fields = info["fields"].as_array().cloned().unwrap_or_default();
         egui::ScrollArea::vertical().max_height(220.0).id_salt("pv_fields").show(ui, |ui| {
@@ -52,7 +54,7 @@ pub fn show(app: &mut SheetApp, ui: &mut Ui) {
             }
         });
         ui.separator();
-        ui.label(egui::RichText::new("Use a field's menu to move it between areas:").small().color(t.text_dim));
+        ui.label(egui::RichText::new(lang.tr("Use a field's menu to move it between areas:")).small().color(t.text_dim));
         let area = |key: &str| -> Vec<String> {
             info["pivot"][key]
                 .as_array()
@@ -79,7 +81,7 @@ pub fn show(app: &mut SheetApp, ui: &mut Ui) {
         ui.columns(2, |cols| {
             for (i, (key, label)) in [("filters", "Filters"), ("columns", "Columns"), ("rows", "Rows"), ("values", "Values")].iter().enumerate() {
                 let ui = &mut cols[i % 2];
-                ui.label(egui::RichText::new(*label).strong());
+                ui.label(egui::RichText::new(lang.tr(label)).strong());
                 egui::Frame::NONE.fill(t.window).corner_radius(4.0).inner_margin(4.0).show(ui, |ui| {
                     ui.set_min_size(vec2(ui.available_width(), 60.0));
                     for f in area_with_values(key) {
@@ -96,7 +98,7 @@ pub fn show(app: &mut SheetApp, ui: &mut Ui) {
                                 ("filters", "Move to Report Filter"),
                                 ("values", "Move to Values"),
                             ] {
-                                if to != *key && (!is_values || matches!(to, "rows" | "columns")) && ui.button(l).clicked() {
+                                if to != *key && (!is_values || matches!(to, "rows" | "columns")) && ui.button(lang.tr(l)).clicked() {
                                     app.run_or_alert("pivot.moveField", json!({"pivot": name, "field": f, "from": key, "to": to}));
                                 }
                             }
@@ -105,25 +107,31 @@ pub fn show(app: &mut SheetApp, ui: &mut Ui) {
                             }
                             if *key == "values" {
                                 ui.separator();
-                                for (func, l) in [("sum", "Sum"), ("count", "Count"), ("average", "Average"), ("max", "Max"), ("min", "Min")] {
-                                    if ui.button(format!("Summarize by {l}")).clicked() {
+                                for (func, l) in [
+                                    ("sum", "Summarize by Sum"),
+                                    ("count", "Summarize by Count"),
+                                    ("average", "Summarize by Average"),
+                                    ("max", "Summarize by Max"),
+                                    ("min", "Summarize by Min"),
+                                ] {
+                                    if ui.button(lang.tr(l)).clicked() {
                                         app.run_or_alert("pivot.valueSettings", json!({"pivot": name, "field": f, "func": func}));
                                     }
                                 }
                                 for (sa, l) in [
-                                    ("normal", "No Calculation"),
-                                    ("percentOfGrandTotal", "% of Grand Total"),
-                                    ("runningTotal", "Running Total"),
-                                    ("rank", "Rank"),
+                                    ("normal", "Show as No Calculation"),
+                                    ("percentOfGrandTotal", "Show as % of Grand Total"),
+                                    ("runningTotal", "Show as Running Total"),
+                                    ("rank", "Show as Rank"),
                                 ] {
-                                    if ui.button(format!("Show as {l}")).clicked() {
+                                    if ui.button(lang.tr(l)).clicked() {
                                         app.run_or_alert("pivot.valueSettings", json!({"pivot": name, "field": f, "showAs": sa}));
                                     }
                                 }
                             } else {
                                 ui.separator();
                                 for (o, l) in [("asc", "Sort A to Z"), ("desc", "Sort Z to A")] {
-                                    if ui.button(l).clicked() {
+                                    if ui.button(lang.tr(l)).clicked() {
                                         app.run_or_alert("pivot.sort", json!({"pivot": name, "field": f, "order": o}));
                                     }
                                 }
@@ -133,13 +141,13 @@ pub fn show(app: &mut SheetApp, ui: &mut Ui) {
                                     ("months", "Group by Months"),
                                     ("none", "Ungroup"),
                                 ] {
-                                    if ui.button(l).clicked() {
+                                    if ui.button(lang.tr(l)).clicked() {
                                         app.run_or_alert("pivot.group", json!({"pivot": name, "field": f, "by": g}));
                                     }
                                 }
                             }
                             ui.separator();
-                            if ui.button("Remove Field").clicked() {
+                            if ui.button(lang.tr("Remove Field")).clicked() {
                                 app.run_or_alert("pivot.removeField", json!({"pivot": name, "field": f, "area": key}));
                             }
                         });
@@ -149,15 +157,15 @@ pub fn show(app: &mut SheetApp, ui: &mut Ui) {
         });
         ui.separator();
         ui.horizontal(|ui| {
-            if ui.button("Refresh").clicked() {
+            if ui.button(lang.tr("Refresh")).clicked() {
                 app.run_or_alert("pivot.refresh", json!({"pivot": name}));
             }
-            if ui.button("Calculated Field…").clicked() {
+            if ui.button(lang.tr("Calculated Field…")).clicked() {
                 app.run_or_alert("pivot.calculatedField", json!({"pivot": name}));
             }
-            egui::ComboBox::from_id_salt("pv_layout").selected_text("Report Layout").show_ui(ui, |ui| {
+            egui::ComboBox::from_id_salt("pv_layout").selected_text(lang.tr("Report Layout")).show_ui(ui, |ui| {
                 for (l, v) in [("Compact", "compact"), ("Outline", "outline"), ("Tabular", "tabular")] {
-                    if ui.button(l).clicked() {
+                    if ui.button(lang.tr(l)).clicked() {
                         app.run_or_alert("pivot.layout", json!({"pivot": name, "layout": v}));
                     }
                 }
diff --git a/crates/ui-egui/tests/interaction.rs b/crates/ui-egui/tests/interaction.rs
index 0958c8c..d136b46 100644
--- a/crates/ui-egui/tests/interaction.rs
+++ b/crates/ui-egui/tests/interaction.rs
@@ -383,6 +383,26 @@ fn language_switch_translates_the_ribbon_and_persists() {
     assert_eq!(h.state().ui.language, Language::En);
 }
 
+#[test]
+fn pivot_fields_pane_follows_the_interface_language() {
+    // #858: the PivotTable Fields pane and its field menus stayed in English after switching to Spanish.
+    let mut h = harness(blank());
+    h.state_mut().run("range.setValues", json!({"range": "A1:B3", "values": [["Region", "Sales"], ["North", 10], ["South", 20]]})).unwrap();
+    h.state_mut().run("insert.pivotTable", json!({"source": "Sheet1!$A$1:$B$3", "rows": ["Region"]})).unwrap();
+    h.state_mut().run("app.language.set", json!({"language": "es"})).unwrap();
+    h.run_steps(4);
+    for label in ["Campos de tabla dinámica", "Filas", "Valores", "Actualizar", "Campo calculado…"] {
+        assert!(h.query_by_label(label).is_some(), "the pane shows `{label}`");
+    }
+    assert!(h.query_by_label("PivotTable Fields").is_none());
+    h.get_by_label("Region ▾").click();
+    h.run_steps(2);
+    for label in ["Mover a rótulos de columna", "Agrupar por años", "Quitar campo"] {
+        assert!(h.query_by_label(label).is_some(), "the field menu shows `{label}`");
+    }
+    assert!(h.query_by_label("Remove Field").is_none());
+}
+
 #[test]
 fn format_cells_draws_its_labels_in_the_interface_language() {
     let mut h = harness(blank());