diff --git a/.changeset/great-spoons-relax.md b/.changeset/great-spoons-relax.md
new file mode 100644
index 000000000..d318bb238
--- /dev/null
+++ b/.changeset/great-spoons-relax.md
@@ -0,0 +1,5 @@
+---
+"vue-demo-store": patch
+---
+
+Added `sw-language-id` header property in `SwContactForm.vue` and `App.vue` components
diff --git a/.changeset/healthy-goats-buy.md b/.changeset/healthy-goats-buy.md
new file mode 100644
index 000000000..faa8a6f52
--- /dev/null
+++ b/.changeset/healthy-goats-buy.md
@@ -0,0 +1,5 @@
+---
+"@shopware/composables": patch
+---
+
+Added `sw-language-id` header property for API calls in `useCart`, `useCategorySearch`, `useCheckout`, `useCustomerOrders`, `useInternationalization`, and `useLandingSearch` composables.
diff --git a/examples/commercial-quick-order/src/App.vue b/examples/commercial-quick-order/src/App.vue
index ecf2f82f1..7dea190f0 100644
--- a/examples/commercial-quick-order/src/App.vue
+++ b/examples/commercial-quick-order/src/App.vue
@@ -10,7 +10,8 @@ import type { Schemas } from "#shopware";
 
 const { apiClient } = useShopwareContext();
 // for initialize the session and get the current currency
-const { currency, refreshSessionContext } = useSessionContext();
+const { currency, refreshSessionContext, languageIdChain } =
+  useSessionContext();
 // to log in a customer, because the Quick Order feature is enabled for specifically selected users (in admin panel)
 const { login } = useUser();
 
@@ -108,6 +109,9 @@ const onAddToCartClick = async () => {
     body: {
       items: lineItemsPayload,
     },
+    headers: {
+      "sw-language-id": languageIdChain.value,
+    },
   });
 
   chosenItems.value = new Map();
diff --git a/packages/cms-base-layer/components/SwContactForm.vue b/packages/cms-base-layer/components/SwContactForm.vue
index f17ea1b34..76c7ecd79 100644
--- a/packages/cms-base-layer/components/SwContactForm.vue
+++ b/packages/cms-base-layer/components/SwContactForm.vue
@@ -11,6 +11,7 @@ import {
   useCmsElementConfig,
   useNavigationContext,
   useSalutations,
+  useSessionContext,
   useShopwareContext,
 } from "#imports";
 
@@ -84,6 +85,7 @@ const { getSalutations } = useSalutations();
 const { foreignKey } = useNavigationContext();
 const { apiClient } = useShopwareContext();
 const { getConfigValue } = useCmsElementConfig(props.content);
+const { languageIdChain } = useSessionContext();
 
 const getConfirmationText = computed(
   () =>
@@ -148,6 +150,9 @@ const invokeSubmit = async () => {
           ...state,
           navigationId: foreignKey.value,
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       });
       formSent.value = true;
     } catch (e) {
diff --git a/packages/composables/src/useCart/useCart.test.ts b/packages/composables/src/useCart/useCart.test.ts
index 32adac434..4721b725d 100644
--- a/packages/composables/src/useCart/useCart.test.ts
+++ b/packages/composables/src/useCart/useCart.test.ts
@@ -86,6 +86,11 @@ describe("useCart", () => {
     await vm.refreshCart();
     expect(injections.apiClient.invoke).toHaveBeenCalledWith(
       expect.stringContaining("readCart"),
+      expect.objectContaining({
+        headers: {
+          "sw-language-id": "",
+        },
+      }),
     );
   });
 
diff --git a/packages/composables/src/useCart/useCart.ts b/packages/composables/src/useCart/useCart.ts
index 5d988ca6d..72d8c9fed 100644
--- a/packages/composables/src/useCart/useCart.ts
+++ b/packages/composables/src/useCart/useCart.ts
@@ -1,7 +1,7 @@
 import { createSharedComposable } from "@vueuse/core";
 import { computed } from "vue";
 import type { ComputedRef } from "vue";
-import { useContext, useShopwareContext } from "#imports";
+import { useContext, useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas, operations } from "#shopware";
 
 /**
@@ -101,6 +101,7 @@ export type UseCartReturn = {
  */
 export function useCartFunction(): UseCartReturn {
   const { apiClient } = useShopwareContext();
+  const { languageIdChain } = useSessionContext();
 
   const _storeCart = useContext<Schemas["Cart"]>("swCart");
   const _storeCartErrors = useContext<Schemas["Cart"]["errors"] | null>(
@@ -115,7 +116,11 @@ export function useCartFunction(): UseCartReturn {
       return newCart;
     }
 
-    const { data } = await apiClient.invoke("readCart get /checkout/cart");
+    const { data } = await apiClient.invoke("readCart get /checkout/cart", {
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
+    });
     _storeCart.value = data;
     setCartErrors(data);
     return data;
diff --git a/packages/composables/src/useCategorySearch/useCategorySearch.test.ts b/packages/composables/src/useCategorySearch/useCategorySearch.test.ts
index 6030712cf..1a85ada4a 100644
--- a/packages/composables/src/useCategorySearch/useCategorySearch.test.ts
+++ b/packages/composables/src/useCategorySearch/useCategorySearch.test.ts
@@ -19,6 +19,7 @@ describe("useCategorySearch", () => {
         },
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": "",
         },
       }),
     );
@@ -41,6 +42,7 @@ describe("useCategorySearch", () => {
         },
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": "",
         },
         body: {
           associations: cmsAssociations,
diff --git a/packages/composables/src/useCategorySearch/useCategorySearch.ts b/packages/composables/src/useCategorySearch/useCategorySearch.ts
index dc62b6dbe..9c5eab6ee 100644
--- a/packages/composables/src/useCategorySearch/useCategorySearch.ts
+++ b/packages/composables/src/useCategorySearch/useCategorySearch.ts
@@ -1,4 +1,4 @@
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas } from "#shopware";
 import { cmsAssociations } from "../cms/cmsAssociations";
 
@@ -31,6 +31,7 @@ export type UseCategorySearchReturn = {
  */
 export function useCategorySearch(): UseCategorySearchReturn {
   const { apiClient } = useShopwareContext();
+  const { languageIdChain } = useSessionContext();
 
   async function search(
     categoryId: string,
@@ -48,6 +49,7 @@ export function useCategorySearch(): UseCategorySearchReturn {
         },
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": languageIdChain.value,
         },
         body: {
           associations,
@@ -70,6 +72,9 @@ export function useCategorySearch(): UseCategorySearchReturn {
         associations,
         ...options?.query,
       },
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
     });
     return result.data.elements ?? [];
   }
diff --git a/packages/composables/src/useCheckout/useCheckout.ts b/packages/composables/src/useCheckout/useCheckout.ts
index d911f3e3c..32c55ae0e 100644
--- a/packages/composables/src/useCheckout/useCheckout.ts
+++ b/packages/composables/src/useCheckout/useCheckout.ts
@@ -80,6 +80,7 @@ export function useCheckout(): UseCheckoutReturn {
     selectedShippingMethod,
     setShippingMethod,
     setPaymentMethod,
+    languageIdChain,
   } = useSessionContext();
 
   const storeShippingMethods = inject("swShippingMethods", ref());
@@ -109,6 +110,9 @@ export function useCheckout(): UseCheckoutReturn {
         query: {
           onlyAvailable: true,
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     storeShippingMethods.value =
@@ -125,6 +129,9 @@ export function useCheckout(): UseCheckoutReturn {
       "readPaymentMethod post /payment-method",
       {
         body: { onlyAvailable: true },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     storePaymentMethods.value = response.data.elements || [];
@@ -136,6 +143,9 @@ export function useCheckout(): UseCheckoutReturn {
   ) {
     const order = await apiClient.invoke("createOrder post /checkout/order", {
       body: params,
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
     });
     return order.data;
   }
diff --git a/packages/composables/src/useCustomerOrders/useCustomerOrders.ts b/packages/composables/src/useCustomerOrders/useCustomerOrders.ts
index 13ff25448..c74e9eca7 100644
--- a/packages/composables/src/useCustomerOrders/useCustomerOrders.ts
+++ b/packages/composables/src/useCustomerOrders/useCustomerOrders.ts
@@ -1,6 +1,6 @@
 import { computed, ref } from "vue";
 import type { ComputedRef, Ref } from "vue";
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas, operations } from "#shopware";
 
 export type UseCustomerOrdersReturn = {
@@ -41,7 +41,7 @@ export type UseCustomerOrdersReturn = {
  */
 export function useCustomerOrders(): UseCustomerOrdersReturn {
   const { apiClient } = useShopwareContext();
-
+  const { languageIdChain } = useSessionContext();
   const orders: Ref<Schemas["Order"][]> = ref([]);
 
   const currentPaginationPage = ref<number>(1);
@@ -61,6 +61,9 @@ export function useCustomerOrders(): UseCustomerOrdersReturn {
     currentParams.value = params;
     const fetchedOrders = await apiClient.invoke("readOrder post /order", {
       body: { ...params, "total-count-mode": "exact" },
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
     });
     orders.value = fetchedOrders.data.orders.elements;
     totalOrderItemsCount.value = fetchedOrders.data.orders.total ?? 0;
diff --git a/packages/composables/src/useInternationalization/useInternationalization.test.ts b/packages/composables/src/useInternationalization/useInternationalization.test.ts
index 8240f1d99..a4164cd97 100644
--- a/packages/composables/src/useInternationalization/useInternationalization.test.ts
+++ b/packages/composables/src/useInternationalization/useInternationalization.test.ts
@@ -29,6 +29,11 @@ describe("useInternationalization", () => {
     vm.getAvailableLanguages();
     expect(injections.apiClient.invoke).toHaveBeenCalledWith(
       expect.stringContaining("readLanguages"),
+      expect.objectContaining({
+        headers: {
+          "sw-language-id": "",
+        },
+      }),
     );
   });
 
@@ -38,7 +43,9 @@ describe("useInternationalization", () => {
     vm.changeLanguage("test-id");
     expect(injections.apiClient.invoke).toHaveBeenCalledWith(
       expect.stringContaining("updateContext"),
-      expect.objectContaining({ body: { languageId: "test-id" } }),
+      expect.objectContaining({
+        body: { languageId: "test-id" },
+      }),
     );
   });
 
diff --git a/packages/composables/src/useInternationalization/useInternationalization.ts b/packages/composables/src/useInternationalization/useInternationalization.ts
index a9dff92d7..ad68457ad 100644
--- a/packages/composables/src/useInternationalization/useInternationalization.ts
+++ b/packages/composables/src/useInternationalization/useInternationalization.ts
@@ -1,6 +1,6 @@
 import { urlIsAbsolute } from "@shopware/helpers";
 import type { Ref } from "vue";
-import { useContext, useShopwareContext } from "#imports";
+import { useContext, useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas, operations } from "#shopware";
 
 export type UseInternationalizationReturn = {
@@ -82,7 +82,7 @@ export function useInternationalization(
 ): UseInternationalizationReturn {
   const { devStorefrontUrl } = useShopwareContext();
   const { apiClient } = useShopwareContext();
-
+  const { languageIdChain } = useSessionContext();
   const _storeLanguages = useContext<Schemas["Language"][]>("swLanguages");
   const _storeCurrentLanguage = useContext<string>(
     "swLanguagesCurrentLanguage",
@@ -94,7 +94,11 @@ export function useInternationalization(
   }
 
   async function getAvailableLanguages() {
-    const { data } = await apiClient.invoke("readLanguages post /language");
+    const { data } = await apiClient.invoke("readLanguages post /language", {
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
+    });
     _storeLanguages.value = data.elements;
     return data;
   }
diff --git a/packages/composables/src/useLandingSearch/useLandingSearch.ts b/packages/composables/src/useLandingSearch/useLandingSearch.ts
index 6f93a9a91..7db78d4c2 100644
--- a/packages/composables/src/useLandingSearch/useLandingSearch.ts
+++ b/packages/composables/src/useLandingSearch/useLandingSearch.ts
@@ -1,4 +1,4 @@
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas, operations } from "#shopware";
 import { cmsAssociations } from "../cms/cmsAssociations";
 
@@ -29,7 +29,7 @@ export function useLandingSearch(): {
   ) => Promise<Schemas["LandingPage"]>;
 } {
   const { apiClient } = useShopwareContext();
-
+  const { languageIdChain } = useSessionContext();
   const search = async (
     navigationId: string,
     options?: {
@@ -47,6 +47,9 @@ export function useLandingSearch(): {
         body: {
           associations,
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     return result.data;
diff --git a/packages/composables/src/useListing/useListing.test.ts b/packages/composables/src/useListing/useListing.test.ts
index ab8e97838..67506c298 100644
--- a/packages/composables/src/useListing/useListing.test.ts
+++ b/packages/composables/src/useListing/useListing.test.ts
@@ -21,7 +21,12 @@ describe("useListing", () => {
 
     expect(injections.apiClient.invoke).toHaveBeenCalledWith(
       expect.stringContaining("search"),
-      expect.objectContaining({}),
+      expect.objectContaining({
+        headers: {
+          "sw-include-seo-urls": true,
+          "sw-language-id": "",
+        },
+      }),
     );
 
     expect(vm.getCurrentPage).toBe(1);
@@ -48,6 +53,7 @@ describe("useListing", () => {
         },
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": "",
         },
         pathParams: {
           categoryId: "1234",
@@ -92,6 +98,7 @@ describe("useListing", () => {
         },
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": "",
         },
         pathParams: {
           categoryId: "1234",
@@ -131,6 +138,7 @@ describe("useListing", () => {
         },
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": "",
         },
         pathParams: {
           categoryId: "1234",
@@ -189,6 +197,7 @@ describe("useListing", () => {
         },
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": "",
         },
       }),
     );
@@ -211,6 +220,7 @@ describe("useListing", () => {
         },
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": "",
         },
       }),
     );
@@ -233,6 +243,7 @@ describe("useListing", () => {
         },
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": "",
         },
       }),
     );
diff --git a/packages/composables/src/useListing/useListing.ts b/packages/composables/src/useListing/useListing.ts
index a07281614..01ec6978d 100644
--- a/packages/composables/src/useListing/useListing.ts
+++ b/packages/composables/src/useListing/useListing.ts
@@ -2,7 +2,7 @@ import { getListingFilters } from "@shopware/helpers";
 import { createInjectionState, createSharedComposable } from "@vueuse/core";
 import { computed, inject, provide, ref } from "vue";
 import type { ComputedRef, Ref } from "vue";
-import { useCategory, useShopwareContext } from "#imports";
+import { useCategory, useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas, operations } from "#shopware";
 
 function isObject<T>(item: T): boolean {
@@ -186,7 +186,7 @@ export function useListing(params?: {
 }): UseListingReturn {
   const listingType = params?.listingType || "categoryListing";
   let categoryId = params?.categoryId || null;
-
+  const { languageIdChain } = useSessionContext();
   // const { getDefaults } = useDefaults({ defaultsKey: contextName });
   const { apiClient } = useShopwareContext();
 
@@ -205,6 +205,7 @@ export function useListing(params?: {
       const { data } = await apiClient.invoke("searchPage post /search", {
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": languageIdChain.value,
         },
         body: searchCriteria,
       });
@@ -224,6 +225,7 @@ export function useListing(params?: {
         {
           headers: {
             "sw-include-seo-urls": true,
+            "sw-language-id": languageIdChain.value,
           },
           pathParams: {
             categoryId: categoryId as string, // null exception in useCategory,
diff --git a/packages/composables/src/useNavigation/useNavigation.ts b/packages/composables/src/useNavigation/useNavigation.ts
index fb4b6bf03..b12a9a33e 100644
--- a/packages/composables/src/useNavigation/useNavigation.ts
+++ b/packages/composables/src/useNavigation/useNavigation.ts
@@ -1,6 +1,6 @@
 import { computed, inject, provide, ref } from "vue";
 import type { ComputedRef, Ref } from "vue";
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas, operations } from "#shopware";
 
 /**
@@ -40,6 +40,7 @@ export function useNavigation(params?: {
   const type = params?.type || "main-navigation";
 
   const { apiClient } = useShopwareContext();
+  const { languageIdChain } = useSessionContext();
 
   const sharedElements: Ref<Schemas["NavigationRouteResponse"]> = inject(
     `swNavigation-${type}`,
@@ -58,6 +59,7 @@ export function useNavigation(params?: {
         {
           headers: {
             "sw-include-seo-urls": true,
+            "sw-language-id": languageIdChain.value,
           },
           pathParams: {
             activeId: type,
diff --git a/packages/composables/src/useNavigationSearch/useNavigationSearch.test.ts b/packages/composables/src/useNavigationSearch/useNavigationSearch.test.ts
index 639c44bd3..e6afb4879 100644
--- a/packages/composables/src/useNavigationSearch/useNavigationSearch.test.ts
+++ b/packages/composables/src/useNavigationSearch/useNavigationSearch.test.ts
@@ -8,6 +8,7 @@ const sessionContext = ref();
 
 vi.mocked(useSessionContext).mockReturnValue({
   sessionContext,
+  languageIdChain: ref(),
 } as unknown as ReturnType<typeof useSessionContext>);
 
 const mockedResponse = {
diff --git a/packages/composables/src/useNavigationSearch/useNavigationSearch.ts b/packages/composables/src/useNavigationSearch/useNavigationSearch.ts
index 8ee828745..c527e7daa 100644
--- a/packages/composables/src/useNavigationSearch/useNavigationSearch.ts
+++ b/packages/composables/src/useNavigationSearch/useNavigationSearch.ts
@@ -16,7 +16,7 @@ export type UseNavigationSearchReturn = {
  */
 export function useNavigationSearch(): UseNavigationSearchReturn {
   const { apiClient } = useShopwareContext();
-  const { sessionContext } = useSessionContext();
+  const { sessionContext, languageIdChain } = useSessionContext();
 
   async function resolvePath(path: string) {
     if (path === "/") {
@@ -49,6 +49,9 @@ export function useNavigationSearch(): UseNavigationSearchReturn {
           },
         ],
       },
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
     });
 
     return seoResult.data.elements?.[0];
diff --git a/packages/composables/src/useOrderDetails/useOrderDetails.ts b/packages/composables/src/useOrderDetails/useOrderDetails.ts
index f5ee5a8d1..669fa5221 100644
--- a/packages/composables/src/useOrderDetails/useOrderDetails.ts
+++ b/packages/composables/src/useOrderDetails/useOrderDetails.ts
@@ -1,7 +1,11 @@
 import { defu } from "defu";
 import { computed, inject, provide, ref } from "vue";
 import type { ComputedRef, Ref } from "vue";
-import { useDefaultOrderAssociations, useShopwareContext } from "#imports";
+import {
+  useDefaultOrderAssociations,
+  useSessionContext,
+  useShopwareContext,
+} from "#imports";
 import type { Schemas } from "#shopware";
 
 export type UseOrderDetailsReturn = {
@@ -129,7 +133,7 @@ export function useOrderDetails(
   associations?: Schemas["Criteria"]["associations"],
 ): UseOrderDetailsReturn {
   const { apiClient } = useShopwareContext();
-
+  const { languageIdChain } = useSessionContext();
   const paymentChangeableList: Ref<{ [key: string]: boolean }> = ref({});
   const _sharedOrder = inject<Ref<Schemas["Order"] | undefined>>(
     "swOrderDetails",
@@ -201,6 +205,9 @@ export function useOrderDetails(
       "readOrder post /order",
       {
         body: params,
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     _sharedOrder.value =
@@ -232,6 +239,9 @@ export function useOrderDetails(
         body: {
           orderId,
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     await loadOrderDetails();
@@ -245,6 +255,9 @@ export function useOrderDetails(
           orderId: orderId,
           paymentMethodId: paymentMethodId,
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
 
@@ -261,6 +274,9 @@ export function useOrderDetails(
           orderId,
           downloadId,
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
 
@@ -275,6 +291,9 @@ export function useOrderDetails(
           documentId,
           deepLinkCode,
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
 
@@ -297,6 +316,9 @@ export function useOrderDetails(
       "readPaymentMethod post /payment-method",
       {
         body: { onlyAvailable: true },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     return response.data.elements || [];
diff --git a/packages/composables/src/useOrderPayment/useOrderPayment.ts b/packages/composables/src/useOrderPayment/useOrderPayment.ts
index d43ccf778..54397742e 100644
--- a/packages/composables/src/useOrderPayment/useOrderPayment.ts
+++ b/packages/composables/src/useOrderPayment/useOrderPayment.ts
@@ -1,6 +1,6 @@
 import { computed, ref } from "vue";
 import type { ComputedRef, Ref } from "vue";
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas } from "#shopware";
 
 export type UseOrderPaymentReturn = {
@@ -56,6 +56,7 @@ export function useOrderPayment(
   order: ComputedRef<Schemas["Order"] | null | undefined>,
 ): UseOrderPaymentReturn {
   const { apiClient } = useShopwareContext();
+  const { languageIdChain } = useSessionContext();
   const activeTransaction = computed(() =>
     order.value?.transactions?.find((t) => t.paymentMethod?.active === true),
   );
@@ -102,6 +103,9 @@ export function useOrderPayment(
           orderId: order.value.id,
           paymentMethodId,
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     return response.data;
diff --git a/packages/composables/src/useProductAssociations/useProductAssociations.ts b/packages/composables/src/useProductAssociations/useProductAssociations.ts
index dc84dd70c..c60717bb7 100644
--- a/packages/composables/src/useProductAssociations/useProductAssociations.ts
+++ b/packages/composables/src/useProductAssociations/useProductAssociations.ts
@@ -1,6 +1,6 @@
 import { computed, ref } from "vue";
 import type { ComputedRef } from "vue";
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas } from "#shopware";
 
 export type UseProductAssociationsReturn = {
@@ -38,7 +38,7 @@ export function useProductAssociations(
 
   // @ts-ignore: temporary until fixed or removed
   const association = options.associationContext;
-
+  const { languageIdChain } = useSessionContext();
   const { apiClient } = useShopwareContext();
   const isLoading = ref(false);
   const associations = ref<Schemas["CrossSellingElementCollection"]>([]);
@@ -85,6 +85,9 @@ export function useProductAssociations(
         "readProductCrossSellings post /product/{productId}/cross-selling",
         {
           pathParams: { productId: product.value.id },
+          headers: {
+            "sw-language-id": languageIdChain.value,
+          },
         },
       );
 
diff --git a/packages/composables/src/useProductConfigurator/useProductConfigurator.ts b/packages/composables/src/useProductConfigurator/useProductConfigurator.ts
index be6a76678..c7d1a1f3c 100644
--- a/packages/composables/src/useProductConfigurator/useProductConfigurator.ts
+++ b/packages/composables/src/useProductConfigurator/useProductConfigurator.ts
@@ -1,7 +1,7 @@
 import { getTranslatedProperty } from "@shopware/helpers";
 import { computed, ref } from "vue";
 import type { ComputedRef, Ref } from "vue";
-import { useProduct, useShopwareContext } from "#imports";
+import { useProduct, useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas } from "#shopware";
 
 export type UseProductConfiguratorReturn = {
@@ -41,7 +41,7 @@ export type UseProductConfiguratorReturn = {
  */
 export function useProductConfigurator(): UseProductConfiguratorReturn {
   const { apiClient } = useShopwareContext();
-
+  const { languageIdChain } = useSessionContext();
   const { configurator, product } = useProduct();
 
   const selected = ref<{
@@ -103,6 +103,9 @@ export function useProductConfigurator(): UseProductConfiguratorReturn {
             seoUrls: {},
           },
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       });
       return response.data.elements?.[0]; // return first matching product
     } catch (e) {
diff --git a/packages/composables/src/useProductReviews/useProductReviews.ts b/packages/composables/src/useProductReviews/useProductReviews.ts
index 8fa164011..df76ff135 100644
--- a/packages/composables/src/useProductReviews/useProductReviews.ts
+++ b/packages/composables/src/useProductReviews/useProductReviews.ts
@@ -1,6 +1,6 @@
 import { computed, ref } from "vue";
 import type { ComputedRef, Ref } from "vue";
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas, operations } from "#shopware";
 
 export type UseProductReviewsReturn = {
@@ -39,7 +39,7 @@ export function useProductReviews(
   product: Ref<Schemas["Product"]>,
 ): UseProductReviewsReturn {
   const { apiClient } = useShopwareContext();
-
+  const { languageIdChain } = useSessionContext();
   const productReviews: Ref<Schemas["ProductReview"][]> = ref([]);
 
   const loadProductReviews = async (
@@ -52,6 +52,9 @@ export function useProductReviews(
       {
         pathParams: { productId: product.value.id },
         body: parameters,
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     productReviews.value = fetchedReviews.data.elements ?? [];
diff --git a/packages/composables/src/useProductSearch/useProductSearch.ts b/packages/composables/src/useProductSearch/useProductSearch.ts
index 1517d4738..2426fb6de 100644
--- a/packages/composables/src/useProductSearch/useProductSearch.ts
+++ b/packages/composables/src/useProductSearch/useProductSearch.ts
@@ -1,5 +1,5 @@
 import { defu } from "defu";
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas } from "#shopware";
 import { cmsAssociations } from "../cms/cmsAssociations";
 
@@ -29,7 +29,7 @@ export type UseProductSearchReturn = {
  */
 export function useProductSearch(): UseProductSearchReturn {
   const { apiClient } = useShopwareContext();
-
+  const { languageIdChain } = useSessionContext();
   const search = async (
     productId: string,
     options?: UseProductSearchReturnOptions,
@@ -44,6 +44,7 @@ export function useProductSearch(): UseProductSearchReturn {
       {
         headers: {
           "sw-include-seo-urls": true,
+          "sw-language-id": languageIdChain.value,
         },
         pathParams: { productId },
         body: associations,
diff --git a/packages/composables/src/useSalutations/useSalutations.ts b/packages/composables/src/useSalutations/useSalutations.ts
index 4258803a0..9c0cc8965 100644
--- a/packages/composables/src/useSalutations/useSalutations.ts
+++ b/packages/composables/src/useSalutations/useSalutations.ts
@@ -1,6 +1,6 @@
 import { computed, inject, onMounted, provide, ref } from "vue";
 import type { ComputedRef } from "vue";
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas, operations } from "#shopware";
 
 export type UseSalutationsReturn = {
@@ -23,14 +23,18 @@ export type UseSalutationsReturn = {
  */
 export function useSalutations(): UseSalutationsReturn {
   const { apiClient } = useShopwareContext();
-
+  const { languageIdChain } = useSessionContext();
   const _salutations = inject("swSalutations", ref());
   provide("swSalutations", _salutations);
 
   const fetchSalutations = async (): Promise<
     operations["readSalutation post /salutation"]["response"]
   > => {
-    const result = await apiClient.invoke("readSalutation post /salutation");
+    const result = await apiClient.invoke("readSalutation post /salutation", {
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
+    });
     _salutations.value = result.data.elements;
     return result.data;
   };
diff --git a/packages/composables/src/useSessionContext/useSessionContext.test.ts b/packages/composables/src/useSessionContext/useSessionContext.test.ts
index 3fc4ef896..f41df39a0 100644
--- a/packages/composables/src/useSessionContext/useSessionContext.test.ts
+++ b/packages/composables/src/useSessionContext/useSessionContext.test.ts
@@ -218,4 +218,22 @@ describe("useSessionContext", () => {
       city: "test",
     });
   });
+
+  it("should return languageIdChain", () => {
+    const { vm } = useSetup(() => useSessionContext());
+    vm.setContext({
+      context: {
+        languageIdChain: ["test", "test2"],
+      },
+    } as unknown as Schemas["SalesChannelContext"]);
+
+    expect(vm.languageIdChain).toStrictEqual("test");
+  });
+
+  it("should return empty languageIdChain", () => {
+    const { vm } = useSetup(() => useSessionContext());
+    vm.setContext({} as unknown as Schemas["SalesChannelContext"]);
+
+    expect(vm.languageIdChain).toStrictEqual("");
+  });
 });
diff --git a/packages/composables/src/useSyncWishlist/useSyncWishlist.ts b/packages/composables/src/useSyncWishlist/useSyncWishlist.ts
index 5819bf508..2cc99979e 100644
--- a/packages/composables/src/useSyncWishlist/useSyncWishlist.ts
+++ b/packages/composables/src/useSyncWishlist/useSyncWishlist.ts
@@ -1,7 +1,7 @@
 import { ApiClientError } from "@shopware/api-client";
 import { computed, ref } from "vue";
 import type { ComputedRef, Ref } from "vue";
-import { useShopwareContext } from "#imports";
+import { useSessionContext, useShopwareContext } from "#imports";
 import type { Schemas } from "#shopware";
 
 export type UseSyncWishlistReturn = {
@@ -48,6 +48,7 @@ const totalWishlistItemsCount: Ref<number> = ref(0);
  */
 export function useSyncWishlist(): UseSyncWishlistReturn {
   const { apiClient } = useShopwareContext();
+  const { languageIdChain } = useSessionContext();
   async function addToWishlistSync(id: string) {
     await apiClient.invoke(
       "addProductOnWishlist post /customer/wishlist/add/{productId}",
@@ -76,7 +77,12 @@ export function useSyncWishlist(): UseSyncWishlistReturn {
     try {
       const response = await apiClient.invoke(
         "readCustomerWishlist post /customer/wishlist",
-        { body: { ...defaultSearchCriteria, "total-count-mode": "exact" } },
+        {
+          body: { ...defaultSearchCriteria, "total-count-mode": "exact" },
+          headers: {
+            "sw-language-id": languageIdChain.value,
+          },
+        },
       );
       _wishlistItems.value = [
         ...response.data.products.elements.map((element) => element.id),
diff --git a/packages/composables/src/useUser/useUser.test.ts b/packages/composables/src/useUser/useUser.test.ts
index c9db6e0bf..bdb943c0c 100644
--- a/packages/composables/src/useUser/useUser.test.ts
+++ b/packages/composables/src/useUser/useUser.test.ts
@@ -22,6 +22,7 @@ vi.mock("../useSessionContext/useSessionContext.ts", async () => {
       return {
         refreshSessionContext: refreshSessionContextSpy,
         userFromContext: ref(),
+        languageIdChain: ref(),
       };
     },
   };
diff --git a/packages/composables/src/useUser/useUser.ts b/packages/composables/src/useUser/useUser.ts
index 05c0520ad..e73e5dcdc 100644
--- a/packages/composables/src/useUser/useUser.ts
+++ b/packages/composables/src/useUser/useUser.ts
@@ -128,7 +128,8 @@ export type UseUserReturn = {
  */
 export function useUser(): UseUserReturn {
   const { apiClient } = useShopwareContext();
-  const { userFromContext, refreshSessionContext } = useSessionContext();
+  const { userFromContext, refreshSessionContext, languageIdChain } =
+    useSessionContext();
 
   const _user = useContext<Schemas["Customer"] | undefined>("customer");
   syncRefs(userFromContext, _user, {
@@ -228,6 +229,9 @@ export function useUser(): UseUserReturn {
           },
         ],
       },
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
     });
 
     country.value = countries.data.elements?.[0] ?? null;
@@ -249,6 +253,9 @@ export function useUser(): UseUserReturn {
             },
           ],
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     salutation.value = salutations.data.elements?.[0] ?? null;
diff --git a/packages/nuxt-module/plugin.ts b/packages/nuxt-module/plugin.ts
index d7418e6e6..3c73b7963 100644
--- a/packages/nuxt-module/plugin.ts
+++ b/packages/nuxt-module/plugin.ts
@@ -1,6 +1,5 @@
 import { createAPIClient } from "@shopware/api-client";
 import { isMaintenanceMode } from "@shopware/helpers";
-import { defu } from "defu";
 import { getCookie } from "h3";
 import Cookies from "js-cookie";
 import { ref } from "vue";
diff --git a/templates/vue-demo-store/components/FrontendAccountCustomerGroupRegistrationPage.vue b/templates/vue-demo-store/components/FrontendAccountCustomerGroupRegistrationPage.vue
index 0e3dd1830..3d6b011bb 100644
--- a/templates/vue-demo-store/components/FrontendAccountCustomerGroupRegistrationPage.vue
+++ b/templates/vue-demo-store/components/FrontendAccountCustomerGroupRegistrationPage.vue
@@ -4,6 +4,7 @@ const props = defineProps<{
 }>();
 
 const { apiClient } = useShopwareContext();
+const { languageIdChain } = useSessionContext();
 
 const { data: registrationResponse } = await useAsyncData(
   `cmsNavigation${props.navigationId}`,
@@ -12,6 +13,9 @@ const { data: registrationResponse } = await useAsyncData(
       "getCustomerGroupRegistrationInfo get /customer-group-registration/config/{customerGroupId}",
       {
         pathParams: { customerGroupId: props.navigationId },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     return response.data || {};
diff --git a/templates/vue-demo-store/components/cms/element/CmsElementProductDescriptionReviews.vue b/templates/vue-demo-store/components/cms/element/CmsElementProductDescriptionReviews.vue
index 60fbb9520..fd2c8d10a 100644
--- a/templates/vue-demo-store/components/cms/element/CmsElementProductDescriptionReviews.vue
+++ b/templates/vue-demo-store/components/cms/element/CmsElementProductDescriptionReviews.vue
@@ -34,6 +34,7 @@ translations = defu(useCmsTranslations(), translations) as Translations;
 
 const currentTab = ref<number>(1);
 const { product } = useProduct(props.content.data?.product);
+const { languageIdChain } = useSessionContext();
 
 const description = computed(() =>
   getTranslatedProperty(product.value, "description"),
@@ -54,6 +55,9 @@ const fetchReviews = async () => {
     "readProductReviews post /product/{productId}/reviews",
     {
       pathParams: { productId: product.value.id },
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
     },
   );
   reviews.value = reviewsResponse.data.elements || [];
diff --git a/templates/vue-demo-store/components/product/ProductReviewsForm.vue b/templates/vue-demo-store/components/product/ProductReviewsForm.vue
index b0bb1e5f8..d9fe2e305 100644
--- a/templates/vue-demo-store/components/product/ProductReviewsForm.vue
+++ b/templates/vue-demo-store/components/product/ProductReviewsForm.vue
@@ -40,7 +40,7 @@ const { apiClient } = useShopwareContext();
 const { resolveApiErrors } = useApiErrorsResolver();
 const { pushError } = useNotifications();
 const { required, minLength } = customValidators();
-
+const { languageIdChain } = useSessionContext();
 const $v = useVuelidate(rules, state);
 
 const emits = defineEmits<(e: "success") => void>();
@@ -66,6 +66,9 @@ const invokeSend = async () => {
           content: state.review,
           points: state.rating || 0,
         },
+        headers: {
+          "sw-language-id": languageIdChain.value,
+        },
       },
     );
     reviewAdded.value = true;
diff --git a/templates/vue-demo-store/pages/wishlist.vue b/templates/vue-demo-store/pages/wishlist.vue
index cb98ba309..119e35f47 100644
--- a/templates/vue-demo-store/pages/wishlist.vue
+++ b/templates/vue-demo-store/pages/wishlist.vue
@@ -32,6 +32,7 @@ const {
   totalPagesCount,
   canSyncWishlist,
 } = useWishlist();
+const { languageIdChain } = useSessionContext();
 defineOptions({
   name: "WishlistPage",
 });
@@ -64,6 +65,9 @@ const loadProductsByItemIds = async (itemIds: string[]): Promise<void> => {
   try {
     const { data } = await apiClient.invoke("readProduct post /product", {
       body: { ids: itemIds || items.value },
+      headers: {
+        "sw-language-id": languageIdChain.value,
+      },
     });
 
     if (data?.elements) {