diff --git a/src/actions/item.actions.ts b/src/actions/item.actions.ts
index d0f10e0..66a0669 100644
--- a/src/actions/item.actions.ts
+++ b/src/actions/item.actions.ts
@@ -1,11 +1,13 @@
 "use server"
 
 import { revalidatePath } from "next/cache"
+
+import { getI18n } from "@/i18n/server"
 import {
+  buildCreateItemSchema,
+  buildUpdateItemSchema,
   type CreateItemFormType,
-  createItemSchema,
   type UpdateItemFormType,
-  updateItemSchema,
 } from "@/schemas/item.schema"
 import { getAuthenticatedUserId } from "@/services/auth.service"
 import {
@@ -14,8 +16,12 @@ import {
   updateItemUseCase,
 } from "@/use-cases/item.use-cases"
 
+import { localizeItemFieldErrors } from "./item.messages"
+
 export async function createItemAction(formData: CreateItemFormType) {
-  const validatedFields = createItemSchema.safeParse(formData)
+  const { dictionary } = await getI18n()
+  const copy = dictionary.inventory.items
+  const validatedFields = buildCreateItemSchema(copy.schema).safeParse(formData)
 
   if (!validatedFields.success) {
     return {
@@ -32,7 +38,11 @@ export async function createItemAction(formData: CreateItemFormType) {
     })
 
     if (!result.success) {
-      return result
+      return {
+        ...result,
+        errors: localizeItemFieldErrors(result.errors, copy.actions),
+        message: copy.actions.createFailure,
+      }
     }
 
     revalidatePath("/inventory/items")
@@ -40,18 +50,20 @@ export async function createItemAction(formData: CreateItemFormType) {
 
     return {
       success: true,
-      message: "Item created successfully!",
+      message: copy.actions.createSuccess,
     }
   } catch (error) {
     console.error("Database error:", error)
     return {
-      error: "Error creating item",
+      error: copy.actions.createFailure,
     }
   }
 }
 
 export async function updateItemAction(formData: UpdateItemFormType) {
-  const validatedFields = updateItemSchema.safeParse(formData)
+  const { dictionary } = await getI18n()
+  const copy = dictionary.inventory.items
+  const validatedFields = buildUpdateItemSchema(copy.schema).safeParse(formData)
 
   if (!validatedFields.success) {
     return {
@@ -68,7 +80,11 @@ export async function updateItemAction(formData: UpdateItemFormType) {
     })
 
     if (!result.success) {
-      return result
+      return {
+        ...result,
+        errors: localizeItemFieldErrors(result.errors, copy.actions),
+        message: copy.actions.updateFailure,
+      }
     }
 
     revalidatePath("/inventory/items")
@@ -76,17 +92,19 @@ export async function updateItemAction(formData: UpdateItemFormType) {
 
     return {
       success: true,
-      message: "Item updated successfully!",
+      message: copy.actions.updateSuccess,
     }
   } catch (error) {
     console.error("Database error:", error)
     return {
-      error: "Failed to update item",
+      error: copy.actions.updateFailure,
     }
   }
 }
 
 export async function deleteItemAction(formData: FormData) {
+  const { dictionary } = await getI18n()
+  const copy = dictionary.inventory.items
   const { id } = Object.fromEntries(formData) as { id: string }
 
   try {
@@ -95,7 +113,8 @@ export async function deleteItemAction(formData: FormData) {
     if (!result.success) {
       return {
         ...result,
-        message: "Failed to delete item",
+        errors: localizeItemFieldErrors(result.errors, copy.actions),
+        message: copy.actions.deleteFailure,
       }
     }
 
@@ -103,13 +122,13 @@ export async function deleteItemAction(formData: FormData) {
 
     return {
       success: true as const,
-      message: "Item deleted successfully!",
+      message: copy.actions.deleteSuccess,
     }
   } catch (error) {
     console.error("Database error:", error)
     return {
       success: false as const,
-      message: "Failed to delete item",
+      message: copy.actions.deleteFailure,
       errors: {},
     }
   }
diff --git a/src/actions/item.messages.ts b/src/actions/item.messages.ts
new file mode 100644
index 0000000..c4617ad
--- /dev/null
+++ b/src/actions/item.messages.ts
@@ -0,0 +1,40 @@
+import type { Dictionary } from "@/i18n/dictionaries"
+
+type ItemActionCopy = Dictionary["inventory"]["items"]["actions"]
+
+type FieldErrors = Record<string, string[]>
+
+const itemErrorMessageKeys = {
+  "An item with this name already exists": "duplicateName",
+  "Item not found": "notFound",
+  "Item has assets, you cannot delete it": "hasAssets",
+  "Item has stock, you cannot delete it": "hasStock",
+  "Invalid stock": "invalidStock",
+  "Stock cannot be negative": "negativeStock",
+} as const satisfies Record<string, keyof ItemActionCopy>
+
+function isItemErrorMessage(
+  message: string,
+): message is keyof typeof itemErrorMessageKeys {
+  return message in itemErrorMessageKeys
+}
+
+function localizeItemMessage(message: string, copy: ItemActionCopy): string {
+  if (!isItemErrorMessage(message)) return message
+
+  return copy[itemErrorMessageKeys[message]]
+}
+
+export function localizeItemFieldErrors(
+  errors: FieldErrors | undefined,
+  copy: ItemActionCopy,
+): FieldErrors | undefined {
+  if (!errors) return undefined
+
+  return Object.fromEntries(
+    Object.entries(errors).map(([field, messages]) => [
+      field,
+      messages.map((message) => localizeItemMessage(message, copy)),
+    ]),
+  )
+}
diff --git a/src/app/(dashboard)/inventory/items/[itemId]/edit/page.tsx b/src/app/(dashboard)/inventory/items/[itemId]/edit/page.tsx
index a893e50..37e8dab 100644
--- a/src/app/(dashboard)/inventory/items/[itemId]/edit/page.tsx
+++ b/src/app/(dashboard)/inventory/items/[itemId]/edit/page.tsx
@@ -33,6 +33,7 @@ export default async function AddItem({
         categories={categories}
         item={item}
         formCopy={copy.form}
+        schemaCopy={copy.schema}
         submitButtonCopy={dictionary.common.submitButton}
       />
     </div>
diff --git a/src/app/(dashboard)/inventory/items/_components/item.copy.ts b/src/app/(dashboard)/inventory/items/_components/item.copy.ts
index 0272dd3..1ab160b 100644
--- a/src/app/(dashboard)/inventory/items/_components/item.copy.ts
+++ b/src/app/(dashboard)/inventory/items/_components/item.copy.ts
@@ -1,6 +1,8 @@
 import type { Dictionary } from "@/i18n/dictionaries"
+import type { ItemSchemaCopy } from "@/schemas/item.schema"
 
 export type ItemListCopy = Dictionary["inventory"]["items"]["list"]
 export type ItemDetailCopy = Dictionary["inventory"]["items"]["detail"]
 export type ItemFormCopy = Dictionary["inventory"]["items"]["form"]
 export type ItemDeleteCopy = Dictionary["inventory"]["items"]["delete"]
+export type { ItemSchemaCopy }
diff --git a/src/app/(dashboard)/inventory/items/_components/new.item.form.tsx b/src/app/(dashboard)/inventory/items/_components/new.item.form.tsx
index 8a8b55d..22c8a73 100644
--- a/src/app/(dashboard)/inventory/items/_components/new.item.form.tsx
+++ b/src/app/(dashboard)/inventory/items/_components/new.item.form.tsx
@@ -2,6 +2,7 @@
 
 import { zodResolver } from "@hookform/resolvers/zod"
 import { useRouter } from "next/navigation"
+import { useMemo } from "react"
 import { useForm } from "react-hook-form"
 import { toast } from "sonner"
 import { createItemAction } from "@/actions/item.actions"
@@ -10,23 +11,26 @@ import {
   type SubmitButtonCopy,
 } from "@/components/forms/submitButton"
 import {
+  buildCreateItemSchema,
   type CreateItemFormType,
-  createItemSchema,
 } from "@/schemas/item.schema"
 import type { CategorySummary } from "@/types"
 
-import type { ItemFormCopy } from "./item.copy"
+import type { ItemFormCopy, ItemSchemaCopy } from "./item.copy"
 
 export default function NewItemForm({
   categories,
   formCopy,
+  schemaCopy,
   submitButtonCopy,
 }: {
   categories: CategorySummary[]
   formCopy: ItemFormCopy
+  schemaCopy: ItemSchemaCopy
   submitButtonCopy: SubmitButtonCopy
 }) {
   const router = useRouter()
+  const schema = useMemo(() => buildCreateItemSchema(schemaCopy), [schemaCopy])
 
   const {
     register,
@@ -34,7 +38,7 @@ export default function NewItemForm({
     setError,
     formState: { errors, isSubmitting, isSubmitSuccessful },
   } = useForm<CreateItemFormType>({
-    resolver: zodResolver(createItemSchema),
+    resolver: zodResolver(schema),
     shouldFocusError: true,
     mode: "onSubmit",
   })
diff --git a/src/app/(dashboard)/inventory/items/_components/update.item.form.tsx b/src/app/(dashboard)/inventory/items/_components/update.item.form.tsx
index 7933269..eac609b 100644
--- a/src/app/(dashboard)/inventory/items/_components/update.item.form.tsx
+++ b/src/app/(dashboard)/inventory/items/_components/update.item.form.tsx
@@ -2,6 +2,7 @@
 
 import { zodResolver } from "@hookform/resolvers/zod"
 import { useRouter } from "next/navigation"
+import { useMemo } from "react"
 import { useForm } from "react-hook-form"
 import { toast } from "sonner"
 import { updateItemAction } from "@/actions/item.actions"
@@ -10,25 +11,28 @@ import {
   type SubmitButtonCopy,
 } from "@/components/forms/submitButton"
 import {
+  buildUpdateItemSchema,
   type UpdateItemFormType,
-  updateItemSchema,
 } from "@/schemas/item.schema"
 import type { CategorySummary, ItemWithAssetCount } from "@/types"
 
-import type { ItemFormCopy } from "./item.copy"
+import type { ItemFormCopy, ItemSchemaCopy } from "./item.copy"
 
 export default function UpdateItemForm({
   categories,
   item,
   formCopy,
+  schemaCopy,
   submitButtonCopy,
 }: {
   categories: CategorySummary[]
   item: ItemWithAssetCount
   formCopy: ItemFormCopy
+  schemaCopy: ItemSchemaCopy
   submitButtonCopy: SubmitButtonCopy
 }) {
   const router = useRouter()
+  const schema = useMemo(() => buildUpdateItemSchema(schemaCopy), [schemaCopy])
 
   const isDisabled = !!item?._count.assets && item?._count.assets > 0
 
@@ -38,7 +42,7 @@ export default function UpdateItemForm({
     setError,
     formState: { errors, isSubmitting, isSubmitSuccessful },
   } = useForm<UpdateItemFormType>({
-    resolver: zodResolver(updateItemSchema),
+    resolver: zodResolver(schema),
     defaultValues: {
       id: item?.id,
       name: item?.name,
diff --git a/src/app/(dashboard)/inventory/items/new/page.tsx b/src/app/(dashboard)/inventory/items/new/page.tsx
index 7b81bdb..f92c5ac 100644
--- a/src/app/(dashboard)/inventory/items/new/page.tsx
+++ b/src/app/(dashboard)/inventory/items/new/page.tsx
@@ -16,6 +16,7 @@ export default async function NewItemPage() {
       <NewItemForm
         categories={categories}
         formCopy={copy.form}
+        schemaCopy={copy.schema}
         submitButtonCopy={dictionary.common.submitButton}
       />
     </div>
diff --git a/src/schemas/item.schema.ts b/src/schemas/item.schema.ts
index 71a12a1..015442f 100644
--- a/src/schemas/item.schema.ts
+++ b/src/schemas/item.schema.ts
@@ -1,33 +1,60 @@
 import { z } from "zod"
 
-export const createItemSchema = z.object({
-  name: z.string().min(1, {
-    error: "Name is required",
-  }),
-  categoryId: z.string().min(1, {
-    error: "Category is required",
-  }),
-  stock: z.coerce.number().int().nonnegative().min(0, {
-    error: "Stock is required",
-  }),
-})
+import type { Dictionary } from "@/i18n/dictionaries"
+
+export type ItemSchemaCopy = Dictionary["inventory"]["items"]["schema"]
+
+const defaultItemSchemaCopy: ItemSchemaCopy = {
+  nameRequired: "Name is required",
+  categoryRequired: "Category is required",
+  stockRequired: "Stock is required",
+  itemRequired: "Item is required",
+}
+
+export function buildCreateItemSchema(copy: ItemSchemaCopy) {
+  return z.object({
+    name: z.string().min(1, {
+      error: copy.nameRequired,
+    }),
+    categoryId: z.string().min(1, {
+      error: copy.categoryRequired,
+    }),
+    stock: z.coerce
+      .number({ error: copy.stockRequired })
+      .int({ error: copy.stockRequired })
+      .nonnegative({ error: copy.stockRequired })
+      .min(0, {
+        error: copy.stockRequired,
+      }),
+  })
+}
+
+export const createItemSchema = buildCreateItemSchema(defaultItemSchemaCopy)
 
 export type CreateItemFormType = z.input<typeof createItemSchema>
 export type CreateItemData = z.output<typeof createItemSchema>
 
-export const updateItemSchema = createItemSchema.extend({
-  id: z.string().min(1, {
-    error: "Item is required",
-  }),
-})
+export function buildUpdateItemSchema(copy: ItemSchemaCopy) {
+  return buildCreateItemSchema(copy).extend({
+    id: z.string().min(1, {
+      error: copy.itemRequired,
+    }),
+  })
+}
+
+export const updateItemSchema = buildUpdateItemSchema(defaultItemSchemaCopy)
 
 export type UpdateItemFormType = z.input<typeof updateItemSchema>
 export type UpdateItemData = z.output<typeof updateItemSchema>
 
-export const getItemByIdSchema = z.object({
-  id: z.string().min(1, {
-    error: "Item is required",
-  }),
-})
+export function buildGetItemByIdSchema(copy: ItemSchemaCopy) {
+  return z.object({
+    id: z.string().min(1, {
+      error: copy.itemRequired,
+    }),
+  })
+}
+
+export const getItemByIdSchema = buildGetItemByIdSchema(defaultItemSchemaCopy)
 
 export type GetItemByIdFormType = z.infer<typeof getItemByIdSchema>
diff --git a/tests/unit/actions/item.messages.test.ts b/tests/unit/actions/item.messages.test.ts
new file mode 100644
index 0000000..1777326
--- /dev/null
+++ b/tests/unit/actions/item.messages.test.ts
@@ -0,0 +1,47 @@
+import { describe, expect, it } from "vitest"
+
+import { localizeItemFieldErrors } from "@/actions/item.messages"
+
+const actionCopy = {
+  createSuccess: "Artículo creado correctamente",
+  createFailure: "Error al crear el artículo",
+  updateSuccess: "Artículo actualizado correctamente",
+  updateFailure: "Error al actualizar el artículo",
+  deleteSuccess: "Artículo eliminado correctamente",
+  deleteFailure: "Error al eliminar el artículo",
+  duplicateName: "El artículo ya existe",
+  notFound: "Artículo no encontrado",
+  hasAssets: "No se puede eliminar un artículo con activos",
+  hasStock: "No se puede eliminar un artículo con stock",
+  invalidStock: "Stock inválido",
+  negativeStock: "El stock no puede ser negativo",
+}
+
+describe("item action message localization", () => {
+  it("localizes known item field errors", () => {
+    expect(
+      localizeItemFieldErrors(
+        {
+          name: ["An item with this name already exists"],
+          id: [
+            "Item not found",
+            "Item has assets, you cannot delete it",
+            "Item has stock, you cannot delete it",
+          ],
+          stock: ["Stock cannot be negative", "Invalid stock"],
+        },
+        actionCopy,
+      ),
+    ).toEqual({
+      name: [actionCopy.duplicateName],
+      id: [actionCopy.notFound, actionCopy.hasAssets, actionCopy.hasStock],
+      stock: [actionCopy.negativeStock, actionCopy.invalidStock],
+    })
+  })
+
+  it("keeps unknown messages unchanged", () => {
+    expect(
+      localizeItemFieldErrors({ name: ["Unexpected item issue"] }, actionCopy),
+    ).toEqual({ name: ["Unexpected item issue"] })
+  })
+})
diff --git a/tests/unit/schemas/item.schema.test.ts b/tests/unit/schemas/item.schema.test.ts
new file mode 100644
index 0000000..62c2a02
--- /dev/null
+++ b/tests/unit/schemas/item.schema.test.ts
@@ -0,0 +1,86 @@
+import { describe, expect, it } from "vitest"
+
+import {
+  buildCreateItemSchema,
+  buildGetItemByIdSchema,
+  buildUpdateItemSchema,
+} from "@/schemas/item.schema"
+
+const schemaCopy = {
+  nameRequired: "El nombre es obligatorio",
+  categoryRequired: "La categoría es obligatoria",
+  stockRequired: "El stock es obligatorio",
+  itemRequired: "El artículo es obligatorio",
+}
+
+describe("item schema localization", () => {
+  it("uses localized create validation messages", () => {
+    const result = buildCreateItemSchema(schemaCopy).safeParse({
+      name: "",
+      categoryId: "",
+      stock: -1,
+    })
+
+    expect(result.success).toBe(false)
+    if (!result.success) {
+      const errors = result.error.flatten().fieldErrors
+
+      expect(errors.name).toContain(schemaCopy.nameRequired)
+      expect(errors.categoryId).toContain(schemaCopy.categoryRequired)
+      expect(errors.stock).toContain(schemaCopy.stockRequired)
+    }
+  })
+
+  it("uses localized update identifier validation messages", () => {
+    const result = buildUpdateItemSchema(schemaCopy).safeParse({
+      id: "",
+      name: "Laptop",
+      categoryId: "category-1",
+      stock: 1,
+    })
+
+    expect(result.success).toBe(false)
+    if (!result.success) {
+      expect(result.error.flatten().fieldErrors.id).toContain(
+        schemaCopy.itemRequired,
+      )
+    }
+  })
+
+  it("uses localized get-by-id validation messages", () => {
+    const result = buildGetItemByIdSchema(schemaCopy).safeParse({ id: "" })
+
+    expect(result.success).toBe(false)
+    if (!result.success) {
+      expect(result.error.flatten().fieldErrors.id).toContain(
+        schemaCopy.itemRequired,
+      )
+    }
+  })
+
+  it("preserves stock coercion and integer validation semantics", () => {
+    const validResult = buildCreateItemSchema(schemaCopy).safeParse({
+      name: "Laptop",
+      categoryId: "category-1",
+      stock: "2",
+    })
+
+    expect(validResult.success).toBe(true)
+    if (validResult.success) {
+      expect(validResult.data.stock).toBe(2)
+    }
+
+    const invalidResult = buildCreateItemSchema(schemaCopy).safeParse({
+      name: "Laptop",
+      categoryId: "category-1",
+      stock: 1.5,
+    })
+
+    expect(invalidResult.success).toBe(false)
+    if (!invalidResult.success) {
+      expect(invalidResult.error.flatten().fieldErrors.stock).toContain(
+        schemaCopy.stockRequired,
+      )
+    }
+  })
+})