diff --git a/sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/config/IntegrationProperties.java b/sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/config/IntegrationProperties.java
index d911d28..519e388 100644
--- a/sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/config/IntegrationProperties.java
+++ b/sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/config/IntegrationProperties.java
@@ -31,10 +31,13 @@ public record IntegrationProperties(
      * @param baseUrl           full API base URL, e.g. {@code https://host/tienda/api}
      * @param apiKey            webservice key sent as {@code ws_key} query param
      * @param defaultCategoryId PrestaShop category ID assigned to new products (default: 2 = Home)
+     * @param languageId        PrestaShop language ID used for all multilingual fields (name, description, etc.)
+     *                          Check yours at GET /api/languages. Default 1 is usually English; set to Spanish ID.
      */
     public record Prestashop(
             @NotBlank String baseUrl,
             @NotBlank String apiKey,
-            int defaultCategoryId
+            int defaultCategoryId,
+            int languageId
     ) {}
 }
diff --git a/sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/integration/prestashop/PrestashopClient.java b/sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/integration/prestashop/PrestashopClient.java
index ec97ea5..dbd8315 100644
--- a/sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/integration/prestashop/PrestashopClient.java
+++ b/sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/integration/prestashop/PrestashopClient.java
@@ -32,6 +32,7 @@ public class PrestashopClient {
 
     private final RestClient restClient;
     private final String wsKey;
+    private final String languageId;
 
     public PrestashopClient(
             @Qualifier("prestashopRestClient") RestClient restClient,
@@ -39,6 +40,7 @@ public class PrestashopClient {
     ) {
         this.restClient = restClient;
         this.wsKey = props.prestashop().apiKey();
+        this.languageId = String.valueOf(props.prestashop().languageId());
     }
 
     // ── Products ──────────────────────────────────────────────────────────
@@ -312,10 +314,10 @@ public class PrestashopClient {
         sb.append("<available_for_order>1</available_for_order>");
         sb.append("<show_price>1</show_price>");
         sb.append("<visibility>both</visibility>");
-        sb.append("<link_rewrite><language id=\"1\">").append(escapeXml(slug)).append("</language></link_rewrite>");
-        sb.append("<name><language id=\"1\">").append(escapeXml(name)).append("</language></name>");
-        sb.append("<description><language id=\"1\">").append(escapeXml(description)).append("</language></description>");
-        sb.append("<description_short><language id=\"1\">").append(escapeXml(descShort)).append("</language></description_short>");
+        sb.append("<link_rewrite><language id=\"").append(languageId).append("\">").append(escapeXml(slug)).append("</language></link_rewrite>");
+        sb.append("<name><language id=\"").append(languageId).append("\">").append(escapeXml(name)).append("</language></name>");
+        sb.append("<description><language id=\"").append(languageId).append("\">").append(escapeXml(description)).append("</language></description>");
+        sb.append("<description_short><language id=\"").append(languageId).append("\">").append(escapeXml(descShort)).append("</language></description_short>");
         List<String> cats = (dto.categoryIds() != null && !dto.categoryIds().isEmpty())
                 ? dto.categoryIds()
                 : (dto.idCategoryDefault() != null ? List.of(dto.idCategoryDefault()) : List.of());
diff --git a/sync-service/src/main/resources/application.yml b/sync-service/src/main/resources/application.yml
index d4c7146..3598a3a 100644
--- a/sync-service/src/main/resources/application.yml
+++ b/sync-service/src/main/resources/application.yml
@@ -16,6 +16,7 @@ integration:
     base-url: ${PRESTASHOP_BASE_URL:https://prestashop.loading.net/tienda/api}
     api-key: ${PRESTASHOP_API_KEY}
     default-category-id: 2
+    language-id: ${PRESTASHOP_LANGUAGE_ID:1}  # set to your Spanish language ID (check GET /api/languages)
 
 api:
   security: