diff --git a/.Jules/palette.md b/.Jules/palette.md
new file mode 100644
index 0000000..3d87d2f
--- /dev/null
+++ b/.Jules/palette.md
@@ -0,0 +1,3 @@
+## 2025-05-14 - Spanish Localization and Accessibility Polish
+**Learning:** The application had several missing Spanish tildes in common UI words ("Día", "más", "descripción", etc.) and lacked ARIA labels for icon-only buttons in the notification bell and calendar components. Proper Spanish localization significantly improves the visual polish and perceived quality of the app.
+**Action:** Always check for proper Spanish accentuation and ensure all icon-only buttons have descriptive `aria-label` attributes. Avoid committing build artifacts like `pnpm-lock.yaml`, log files, or PWA scripts (`sw.js`).
diff --git a/frontend/components/calendar/task-calendar.tsx b/frontend/components/calendar/task-calendar.tsx
index 448910a..43ce258 100644
--- a/frontend/components/calendar/task-calendar.tsx
+++ b/frontend/components/calendar/task-calendar.tsx
@@ -109,6 +109,7 @@ export default function TaskCalendar({ token, onTaskClick }: TaskCalendarProps)
           variant="outline"
           size="icon"
           onClick={() => onNavigate("PREV")}
+          aria-label="Anterior"
         >
           <ChevronLeft className="h-4 w-4" />
         </Button>
@@ -116,6 +117,7 @@ export default function TaskCalendar({ token, onTaskClick }: TaskCalendarProps)
           variant="outline"
           size="icon"
           onClick={() => onNavigate("NEXT")}
+          aria-label="Siguiente"
         >
           <ChevronRight className="h-4 w-4" />
         </Button>
@@ -150,7 +152,7 @@ export default function TaskCalendar({ token, onTaskClick }: TaskCalendarProps)
           size="sm"
           onClick={() => setView(Views.DAY)}
         >
-          Dia
+          Día
         </Button>
       </div>
     </div>
@@ -162,13 +164,13 @@ export default function TaskCalendar({ token, onTaskClick }: TaskCalendarProps)
     next: "Siguiente",
     month: "Mes",
     week: "Semana",
-    day: "Dia",
+    day: "Día",
     agenda: "Agenda",
     date: "Fecha",
     time: "Hora",
     event: "Evento",
     noEventsInRange: "No hay tareas en este rango",
-    showMore: (total: number) => `+ ${total} mas`,
+    showMore: (total: number) => `+ ${total} más`,
   };
 
   return (
diff --git a/frontend/components/notifications/notification-bell.tsx b/frontend/components/notifications/notification-bell.tsx
index 3c19cdb..ef5431a 100644
--- a/frontend/components/notifications/notification-bell.tsx
+++ b/frontend/components/notifications/notification-bell.tsx
@@ -97,7 +97,12 @@ export default function NotificationBell({ token }: NotificationBellProps) {
   return (
     <Popover open={open} onOpenChange={setOpen}>
       <PopoverTrigger asChild>
-        <Button variant="ghost" size="icon" className="relative">
+        <Button
+          variant="ghost"
+          size="icon"
+          className="relative"
+          aria-label="Ver notificaciones"
+        >
           <Bell className="h-5 w-5" />
           {unreadCount > 0 && (
             <Badge
diff --git a/frontend/components/tasks/task-dashboard.tsx b/frontend/components/tasks/task-dashboard.tsx
index eaa3798..0107e88 100644
--- a/frontend/components/tasks/task-dashboard.tsx
+++ b/frontend/components/tasks/task-dashboard.tsx
@@ -170,7 +170,7 @@ export default function TaskDashboard({
           <ModeToggle />
           <Button variant="ghost" size="sm" onClick={handleLogout} className="text-muted-foreground hover:text-destructive transition-colors">
             <LogOut className="h-4 w-4 mr-2" />
-            Cerrar sesion
+            Cerrar sesión
           </Button>
         </div>
       </header>
@@ -241,7 +241,7 @@ export default function TaskDashboard({
                       value="mis-tareas"
                       className="data-[state=active]:bg-background"
                     >
-                      Mias
+                      Mías
                       <Badge variant="secondary" className="ml-2 bg-background/50">
                         {myTasksCount}
                       </Badge>
diff --git a/frontend/components/tasks/task-filters.tsx b/frontend/components/tasks/task-filters.tsx
index f00cf38..f9432e0 100644
--- a/frontend/components/tasks/task-filters.tsx
+++ b/frontend/components/tasks/task-filters.tsx
@@ -132,6 +132,7 @@ export default function TaskFiltersComponent({
           size="icon"
           onClick={() => setShowFilters(!showFilters)}
           className="relative"
+          aria-label="Filtrar tareas"
         >
           <Filter className="h-4 w-4" />
           {activeFilterCount > 0 && (
@@ -326,10 +327,11 @@ export default function TaskFiltersComponent({
           )}
           {activeFilters.search && (
             <Badge variant="secondary" className="text-xs">
-              Busqueda: {activeFilters.search}
+              Búsqueda: {activeFilters.search}
               <button
                 className="ml-1 hover:text-destructive"
                 onClick={() => handleSearchChange("")}
+                aria-label="Quitar filtro de búsqueda"
               >
                 <X className="h-3 w-3" />
               </button>
diff --git a/frontend/components/tasks/task-form.tsx b/frontend/components/tasks/task-form.tsx
index e03922b..fc66eb3 100644
--- a/frontend/components/tasks/task-form.tsx
+++ b/frontend/components/tasks/task-form.tsx
@@ -175,7 +175,7 @@ export default function TaskForm({
     <form onSubmit={handleSubmit} className="space-y-4">
       <div className="space-y-4">
         <div className="space-y-2">
-          <Label htmlFor="task-title">Titulo de la tarea</Label>
+          <Label htmlFor="task-title">Título de la tarea</Label>
           <Input
             id="task-title"
             placeholder="Ej: Comprar leche"
@@ -186,7 +186,7 @@ export default function TaskForm({
         </div>
 
         <div className="space-y-2">
-          <Label htmlFor="task-description">Descripcion (opcional)</Label>
+          <Label htmlFor="task-description">Descripción (opcional)</Label>
           <Textarea
             id="task-description"
             placeholder="Detalles adicionales sobre la tarea"
@@ -198,7 +198,7 @@ export default function TaskForm({
 
         <div className="grid grid-cols-2 gap-3">
           <div className="space-y-2">
-            <Label>Fecha limite</Label>
+            <Label>Fecha límite</Label>
             <Popover open={calendarOpen} onOpenChange={setCalendarOpen}>
               <PopoverTrigger asChild>
                 <Button
@@ -371,7 +371,7 @@ export default function TaskForm({
         </Button>
         {editingTask && (
           <Button type="button" variant="ghost" onClick={onCancel} className="w-full h-10">
-            Cancelar Edicion
+            Cancelar Edición
           </Button>
         )}
       </div>
diff --git a/frontend/components/tasks/task-list.tsx b/frontend/components/tasks/task-list.tsx
index 5420bf5..4421ad6 100644
--- a/frontend/components/tasks/task-list.tsx
+++ b/frontend/components/tasks/task-list.tsx
@@ -66,7 +66,7 @@ function getDueDateInfo(dueDate: string) {
   }
   if (isTomorrow(date)) {
     return {
-      label: "Manana",
+      label: "Mañana",
       className: "text-blue-600 dark:text-blue-400",
       icon: Calendar,
     };
@@ -177,7 +177,7 @@ export default function TaskList({
                           size="sm"
                           className="h-6 w-6 p-0"
                           onClick={() => toggleTaskExpansion(task.id)}
-                          aria-label={isExpanded ? "Contraer descripcion" : "Expandir descripcion"}
+                          aria-label={isExpanded ? "Contraer descripción" : "Expandir descripción"}
                         >
                           {isExpanded ? (
                             <ChevronUp className="h-4 w-4" />
@@ -203,7 +203,7 @@ export default function TaskList({
                           onClick={() => toggleTaskExpansion(task.id)}
                           className="text-xs font-semibold text-primary hover:underline mt-1 focus:outline-none"
                         >
-                          {isExpanded ? "Ver menos" : "Ver mas"}
+                          {isExpanded ? "Ver menos" : "Ver más"}
                         </button>
                       )}
                     </div>