diff --git a/app/services/vendor_product_service.py b/app/services/vendor_product_service.py
index 772db8b6..4d5a88ef 100644
--- a/app/services/vendor_product_service.py
+++ b/app/services/vendor_product_service.py
@@ -198,6 +198,9 @@ class VendorProductService:
             "vendor_code": product.vendor.vendor_code if product.vendor else None,
             "marketplace_product_id": product.marketplace_product_id,
             "vendor_sku": product.vendor_sku,
+            # Product identifiers
+            "gtin": product.gtin,
+            "gtin_type": product.gtin_type or "ean13",
             # Product fields with source comparison info
             **source_comparison_info,
             # Vendor-specific fields
@@ -275,29 +278,67 @@ class VendorProductService:
         Args:
             db: Database session
             product_id: Product ID to update
-            data: Fields to update
+            data: Fields to update (may include translations dict)
 
         Returns:
             Updated Product instance
         """
-        product = db.query(Product).filter(Product.id == product_id).first()
+        from models.database.product_translation import ProductTranslation
+
+        product = (
+            db.query(Product)
+            .options(joinedload(Product.translations))
+            .filter(Product.id == product_id)
+            .first()
+        )
 
         if not product:
             raise ProductNotFoundException(product_id)
 
-        # Update allowed fields
+        # Handle translations separately
+        if "translations" in data and data["translations"]:
+            existing_translations = {t.language: t for t in product.translations}
+
+            for lang, trans_data in data["translations"].items():
+                if lang in existing_translations:
+                    # Update existing translation
+                    if "title" in trans_data:
+                        existing_translations[lang].title = trans_data["title"]
+                    if "description" in trans_data:
+                        existing_translations[lang].description = trans_data["description"]
+                else:
+                    # Create new translation
+                    new_trans = ProductTranslation(
+                        product_id=product_id,
+                        language=lang,
+                        title=trans_data.get("title"),
+                        description=trans_data.get("description"),
+                    )
+                    db.add(new_trans)
+
+        # Handle price (convert to cents)
+        if "price" in data and data["price"] is not None:
+            product.price = data["price"]  # Uses property setter to convert to cents
+
+        if "sale_price" in data:
+            product.sale_price = data["sale_price"]  # Uses property setter
+
+        if "cost" in data:
+            product.cost = data["cost"]  # Uses property setter
+
+        # Update other allowed fields
+        # Note: is_digital is derived from marketplace_product, not directly updatable
         updatable_fields = [
             "vendor_sku",
             "brand",
             "gtin",
-            "price_override",
-            "currency_override",
-            "availability",
+            "gtin_type",
+            "currency",
+            "tax_rate_percent",
             "is_active",
             "is_featured",
-            "is_digital",
-            "description",
-            "title",
+            "primary_image_url",
+            "supplier",
         ]
 
         for field in updatable_fields:
diff --git a/app/templates/admin/vendor-product-edit.html b/app/templates/admin/vendor-product-edit.html
index 213eee1a..577c5105 100644
--- a/app/templates/admin/vendor-product-edit.html
+++ b/app/templates/admin/vendor-product-edit.html
@@ -8,7 +8,7 @@
 {% block alpine_data %}adminVendorProductEdit(){% endblock %}
 
 {% block content %}
-{% call detail_page_header("'Edit: ' + (product?.title || 'Product')", '/admin/vendor-products', subtitle_show='product') %}
+{% call detail_page_header("'Edit: ' + (product?.vendor_translations?.en?.title || 'Product')", '/admin/vendor-products', subtitle_show='product') %}
     <span x-text="product?.vendor_name || 'Unknown Vendor'"></span>
 {% endcall %}
 
@@ -17,50 +17,127 @@
 {{ error_state('Error loading product') }}
 
 <!-- Edit Form -->
-<div x-show="!loading && product">
+<div x-show="!loading && product" x-cloak>
     <form @submit.prevent="saveProduct()">
-        <!-- Basic Information -->
+        <!-- Translations (Tabbed) -->
         <div class="px-4 py-5 mb-6 bg-white rounded-lg shadow-md dark:bg-gray-800">
             <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
-                Basic Information
+                Product Information <span class="text-red-500">*</span>
             </h3>
-            <div class="grid gap-4 md:grid-cols-2">
+
+            <!-- Language Tabs -->
+            <div class="border-b border-gray-200 dark:border-gray-700 mb-4">
+                <nav class="flex space-x-4">
+                    <template x-for="lang in ['en', 'fr', 'de', 'lu']" :key="lang">
+                        <button
+                            type="button"
+                            @click="activeLanguage = lang"
+                            :class="activeLanguage === lang ? 'border-purple-500 text-purple-600 dark:text-purple-400' : 'border-transparent text-gray-500 hover:text-gray-700 dark:text-gray-400'"
+                            class="py-2 px-1 border-b-2 font-medium text-sm uppercase"
+                            x-text="lang"
+                        ></button>
+                    </template>
+                </nav>
+            </div>
+
+            <!-- Translation Fields -->
+            <template x-for="lang in ['en', 'fr', 'de', 'lu']" :key="lang">
+                <div x-show="activeLanguage === lang" class="space-y-4">
+                    <div>
+                        <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                            Title (<span x-text="lang.toUpperCase()"></span>) <span class="text-red-500">*</span>
+                        </label>
+                        <input
+                            type="text"
+                            x-model="form.translations[lang].title"
+                            :required="lang === 'en'"
+                            class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
+                            placeholder="Product title"
+                        />
+                    </div>
+                    <div>
+                        <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                            Description (<span x-text="lang.toUpperCase()"></span>) <span class="text-red-500">*</span>
+                        </label>
+                        <textarea
+                            x-model="form.translations[lang].description"
+                            rows="5"
+                            :required="lang === 'en'"
+                            class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
+                            placeholder="Product description"
+                        ></textarea>
+                    </div>
+                </div>
+            </template>
+        </div>
+
+        <!-- Product Identifiers -->
+        <div class="px-4 py-5 mb-6 bg-white rounded-lg shadow-md dark:bg-gray-800">
+            <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
+                Product Identifiers
+            </h3>
+            <div class="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
                 <div>
-                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">Title</label>
-                    <input
-                        type="text"
-                        x-model="form.title"
-                        class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
-                        placeholder="Product title"
-                    />
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                        Vendor SKU <span class="text-red-500">*</span>
+                    </label>
+                    <div class="flex gap-2">
+                        <input
+                            type="text"
+                            x-model="form.vendor_sku"
+                            required
+                            class="flex-1 px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300 font-mono"
+                            placeholder="XXXX_XXXX_XXXX"
+                        />
+                        <button
+                            type="button"
+                            @click="generateSku()"
+                            class="px-3 py-2 text-xs font-medium text-purple-600 dark:text-purple-400 border border-purple-300 dark:border-purple-600 rounded-lg hover:bg-purple-50 dark:hover:bg-purple-900/20"
+                            title="Auto-generate SKU"
+                        >
+                            <span x-html="$icon('refresh', 'w-4 h-4')"></span>
+                        </button>
+                    </div>
                 </div>
                 <div>
-                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">Brand</label>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                        Brand <span class="text-red-500">*</span>
+                    </label>
                     <input
                         type="text"
                         x-model="form.brand"
+                        required
                         class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
                         placeholder="Brand name"
                     />
                 </div>
                 <div>
-                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">Vendor SKU</label>
-                    <input
-                        type="text"
-                        x-model="form.vendor_sku"
-                        class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
-                        placeholder="SKU"
-                    />
-                </div>
-                <div>
-                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">GTIN/EAN</label>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                        GTIN/EAN <span class="text-red-500">*</span>
+                    </label>
                     <input
                         type="text"
                         x-model="form.gtin"
-                        class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
-                        placeholder="GTIN/EAN"
+                        required
+                        class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300 font-mono"
+                        placeholder="4007817144145"
                     />
                 </div>
+                <div>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                        GTIN Type <span class="text-red-500">*</span>
+                    </label>
+                    <select
+                        x-model="form.gtin_type"
+                        required
+                        class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
+                    >
+                        <option value="ean13">EAN-13</option>
+                        <option value="ean8">EAN-8</option>
+                        <option value="upc">UPC</option>
+                        <option value="isbn">ISBN</option>
+                    </select>
+                </div>
             </div>
         </div>
 
@@ -69,51 +146,121 @@
             <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
                 Pricing
             </h3>
-            <div class="grid gap-4 md:grid-cols-3">
+            <div class="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
                 <div>
-                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">Price Override</label>
-                    <input
-                        type="number"
-                        step="0.01"
-                        x-model="form.price_override"
-                        class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
-                        placeholder="Leave empty to use source price"
-                    />
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                        Price (incl. VAT) <span class="text-red-500">*</span>
+                    </label>
+                    <div class="relative">
+                        <span class="absolute inset-y-0 left-0 flex items-center pl-3 text-gray-500 dark:text-gray-400">EUR</span>
+                        <input
+                            type="number"
+                            step="0.01"
+                            min="0"
+                            x-model.number="form.price"
+                            required
+                            class="w-full pl-12 pr-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
+                            placeholder="0.00"
+                        />
+                    </div>
                 </div>
                 <div>
-                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">Currency</label>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                        Sale Price (optional)
+                    </label>
+                    <div class="relative">
+                        <span class="absolute inset-y-0 left-0 flex items-center pl-3 text-gray-500 dark:text-gray-400">EUR</span>
+                        <input
+                            type="number"
+                            step="0.01"
+                            min="0"
+                            x-model.number="form.sale_price"
+                            class="w-full pl-12 pr-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
+                            placeholder="0.00"
+                        />
+                    </div>
+                </div>
+                <div>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                        Currency <span class="text-red-500">*</span>
+                    </label>
                     <select
-                        x-model="form.currency_override"
+                        x-model="form.currency"
+                        required
                         class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
                     >
-                        <option value="">Use source currency</option>
                         <option value="EUR">EUR</option>
                         <option value="USD">USD</option>
                         <option value="GBP">GBP</option>
                     </select>
                 </div>
                 <div>
-                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">Availability</label>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                        VAT Rate <span class="text-red-500">*</span>
+                    </label>
                     <select
-                        x-model="form.availability"
+                        x-model.number="form.tax_rate_percent"
+                        required
                         class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
                     >
-                        <option value="">Not specified</option>
-                        <option value="in_stock">In Stock</option>
-                        <option value="out_of_stock">Out of Stock</option>
-                        <option value="preorder">Preorder</option>
-                        <option value="backorder">Backorder</option>
+                        <option value="17">17% (Standard)</option>
+                        <option value="14">14% (Intermediate)</option>
+                        <option value="8">8% (Reduced)</option>
+                        <option value="3">3% (Super-reduced)</option>
                     </select>
                 </div>
             </div>
         </div>
 
-        <!-- Status -->
+        <!-- Image -->
         <div class="px-4 py-5 mb-6 bg-white rounded-lg shadow-md dark:bg-gray-800">
             <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
-                Status
+                Primary Image <span class="text-red-500">*</span>
+            </h3>
+            <div class="grid gap-4 md:grid-cols-2">
+                <div>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">
+                        Image URL <span class="text-red-500">*</span>
+                    </label>
+                    <input
+                        type="url"
+                        x-model="form.primary_image_url"
+                        required
+                        class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
+                        placeholder="https://..."
+                    />
+                </div>
+                <div>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">Preview</label>
+                    <div class="w-24 h-24 rounded-lg overflow-hidden bg-gray-100 dark:bg-gray-700 border border-gray-300 dark:border-gray-600">
+                        <template x-if="form.primary_image_url">
+                            <img :src="form.primary_image_url" class="w-full h-full object-cover" />
+                        </template>
+                        <template x-if="!form.primary_image_url">
+                            <div class="w-full h-full flex items-center justify-center">
+                                <span x-html="$icon('photograph', 'w-8 h-8 text-gray-400')"></span>
+                            </div>
+                        </template>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <!-- Product Type & Status -->
+        <div class="px-4 py-5 mb-6 bg-white rounded-lg shadow-md dark:bg-gray-800">
+            <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
+                Product Type & Status
             </h3>
             <div class="flex flex-wrap gap-6">
+                <label class="flex items-center opacity-60 cursor-not-allowed" title="Derived from marketplace product">
+                    <input
+                        type="checkbox"
+                        x-model="form.is_digital"
+                        disabled
+                        class="w-4 h-4 text-purple-600 border-gray-300 rounded focus:ring-purple-500 cursor-not-allowed"
+                    />
+                    <span class="ml-2 text-sm text-gray-700 dark:text-gray-300">Digital Product <span class="text-xs text-gray-500">(from source)</span></span>
+                </label>
                 <label class="flex items-center">
                     <input
                         type="checkbox"
@@ -130,28 +277,39 @@
                     />
                     <span class="ml-2 text-sm text-gray-700 dark:text-gray-300">Featured</span>
                 </label>
-                <label class="flex items-center">
-                    <input
-                        type="checkbox"
-                        x-model="form.is_digital"
-                        class="w-4 h-4 text-purple-600 border-gray-300 rounded focus:ring-purple-500"
-                    />
-                    <span class="ml-2 text-sm text-gray-700 dark:text-gray-300">Digital Product</span>
-                </label>
             </div>
         </div>
 
-        <!-- Description -->
+        <!-- Optional: Supplier Info -->
         <div class="px-4 py-5 mb-6 bg-white rounded-lg shadow-md dark:bg-gray-800">
             <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
-                Description
+                Supplier Info (Optional)
             </h3>
-            <textarea
-                x-model="form.description"
-                rows="6"
-                class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
-                placeholder="Product description (HTML supported)"
-            ></textarea>
+            <div class="grid gap-4 md:grid-cols-2">
+                <div>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">Supplier</label>
+                    <input
+                        type="text"
+                        x-model="form.supplier"
+                        class="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
+                        placeholder="Supplier name"
+                    />
+                </div>
+                <div>
+                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-1">Cost (what you pay)</label>
+                    <div class="relative">
+                        <span class="absolute inset-y-0 left-0 flex items-center pl-3 text-gray-500 dark:text-gray-400">EUR</span>
+                        <input
+                            type="number"
+                            step="0.01"
+                            min="0"
+                            x-model.number="form.cost"
+                            class="w-full pl-12 pr-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-lg focus:border-purple-400 focus:outline-none dark:bg-gray-700 dark:text-gray-300"
+                            placeholder="0.00"
+                        />
+                    </div>
+                </div>
+            </div>
         </div>
 
         <!-- Actions -->
@@ -164,7 +322,7 @@
             </a>
             <button
                 type="submit"
-                :disabled="saving"
+                :disabled="saving || !isFormValid()"
                 class="flex items-center px-4 py-2 text-sm font-medium text-white bg-purple-600 rounded-lg hover:bg-purple-700 transition-colors disabled:opacity-50"
             >
                 <span x-show="saving" x-html="$icon('spinner', 'w-4 h-4 mr-2')"></span>
diff --git a/models/schema/vendor_product.py b/models/schema/vendor_product.py
index 0a312a46..a47a1aea 100644
--- a/models/schema/vendor_product.py
+++ b/models/schema/vendor_product.py
@@ -87,6 +87,9 @@ class VendorProductDetail(BaseModel):
     vendor_code: str | None = None
     marketplace_product_id: int
     vendor_sku: str | None = None
+    # Product identifiers
+    gtin: str | None = None
+    gtin_type: str | None = None  # ean13, ean8, upc, isbn, etc.
     # Product fields with source comparison
     price: float | None = None
     price_cents: int | None = None
@@ -163,20 +166,41 @@ class VendorProductCreate(BaseModel):
     description: str | None = None
 
 
+class TranslationUpdate(BaseModel):
+    """Translation data for a single language."""
+
+    title: str | None = None
+    description: str | None = None
+
+
 class VendorProductUpdate(BaseModel):
     """Schema for updating a vendor product."""
 
-    title: str | None = None
+    # Translations by language code (en, fr, de, lu)
+    translations: dict[str, TranslationUpdate] | None = None
+
+    # Product identifiers
     brand: str | None = None
     vendor_sku: str | None = None
     gtin: str | None = None
-    price_override: float | None = None
-    currency_override: str | None = None
-    availability: str | None = None
+    gtin_type: str | None = None  # ean13, ean8, upc, isbn, etc.
+
+    # Pricing
+    price: float | None = None  # Price incl. VAT in euros
+    sale_price: float | None = None  # Optional sale price
+    currency: str | None = None
+    tax_rate_percent: int | None = None  # 3, 8, 14, 17
+
+    # Status (is_digital is derived from marketplace product, not editable)
     is_active: bool | None = None
     is_featured: bool | None = None
-    is_digital: bool | None = None
-    description: str | None = None
+
+    # Images
+    primary_image_url: str | None = None
+
+    # Optional supplier info
+    supplier: str | None = None
+    cost: float | None = None  # Cost in euros
 
 
 class VendorProductCreateResponse(BaseModel):
diff --git a/static/admin/js/vendor-product-edit.js b/static/admin/js/vendor-product-edit.js
index 65a2e703..6dc69024 100644
--- a/static/admin/js/vendor-product-edit.js
+++ b/static/admin/js/vendor-product-edit.js
@@ -1,7 +1,7 @@
 // static/admin/js/vendor-product-edit.js
 /**
  * Admin vendor product edit page logic
- * Edit vendor product information and overrides
+ * Edit vendor product information with translations
  */
 
 const adminVendorProductEditLog = window.LogConfig.loggers.adminVendorProductEdit ||
@@ -16,6 +16,14 @@ function adminVendorProductEdit() {
     const pathParts = window.location.pathname.split('/');
     const productId = parseInt(pathParts[pathParts.length - 2]); // /vendor-products/{id}/edit
 
+    // Default translations structure
+    const defaultTranslations = () => ({
+        en: { title: '', description: '' },
+        fr: { title: '', description: '' },
+        de: { title: '', description: '' },
+        lu: { title: '', description: '' }
+    });
+
     return {
         // Inherit base layout state
         ...data(),
@@ -31,22 +39,35 @@ function adminVendorProductEdit() {
         saving: false,
         error: '',
 
-        // Product data
+        // Product data from API
         product: null,
 
+        // Active language tab
+        activeLanguage: 'en',
+
         // Form data
         form: {
-            title: '',
-            brand: '',
+            // Translations by language
+            translations: defaultTranslations(),
+            // Product identifiers
             vendor_sku: '',
+            brand: '',
             gtin: '',
-            price_override: null,
-            currency_override: '',
-            availability: '',
+            gtin_type: 'ean13',
+            // Pricing
+            price: null,
+            sale_price: null,
+            currency: 'EUR',
+            tax_rate_percent: 17,
+            // Image
+            primary_image_url: '',
+            // Product type & status
+            is_digital: false,
             is_active: true,
             is_featured: false,
-            is_digital: false,
-            description: ''
+            // Optional supplier info
+            supplier: '',
+            cost: null
         },
 
         async init() {
@@ -76,22 +97,46 @@ function adminVendorProductEdit() {
                 const response = await apiClient.get(`/admin/vendor-products/${this.productId}`);
                 this.product = response;
 
+                adminVendorProductEditLog.info('Loaded product:', response);
+
+                // Populate translations from vendor_translations
+                const translations = defaultTranslations();
+                if (response.vendor_translations) {
+                    for (const lang of ['en', 'fr', 'de', 'lu']) {
+                        if (response.vendor_translations[lang]) {
+                            translations[lang] = {
+                                title: response.vendor_translations[lang].title || '',
+                                description: response.vendor_translations[lang].description || ''
+                            };
+                        }
+                    }
+                }
+
                 // Populate form with current values
                 this.form = {
-                    title: response.title || '',
-                    brand: response.brand || '',
+                    translations: translations,
+                    // Product identifiers
                     vendor_sku: response.vendor_sku || '',
+                    brand: response.brand || '',
                     gtin: response.gtin || '',
-                    price_override: response.price_override || null,
-                    currency_override: response.currency_override || '',
-                    availability: response.availability || '',
+                    gtin_type: response.gtin_type || 'ean13',
+                    // Pricing (convert cents to euros if stored as cents)
+                    price: response.price || null,
+                    sale_price: response.sale_price || null,
+                    currency: response.currency || 'EUR',
+                    tax_rate_percent: response.tax_rate_percent ?? 17,
+                    // Image
+                    primary_image_url: response.primary_image_url || '',
+                    // Product type & status
+                    is_digital: response.is_digital ?? false,
                     is_active: response.is_active ?? true,
                     is_featured: response.is_featured ?? false,
-                    is_digital: response.is_digital ?? false,
-                    description: response.description || ''
+                    // Optional supplier info
+                    supplier: response.supplier || '',
+                    cost: response.cost || null
                 };
 
-                adminVendorProductEditLog.info('Loaded product:', this.product.id);
+                adminVendorProductEditLog.info('Form initialized:', this.form);
             } catch (error) {
                 adminVendorProductEditLog.error('Failed to load product:', error);
                 this.error = error.message || 'Failed to load product details';
@@ -100,28 +145,112 @@ function adminVendorProductEdit() {
             }
         },
 
+        /**
+         * Check if form is valid (all mandatory fields filled)
+         */
+        isFormValid() {
+            // English title and description are required
+            if (!this.form.translations.en.title?.trim()) return false;
+            if (!this.form.translations.en.description?.trim()) return false;
+
+            // Product identifiers
+            if (!this.form.vendor_sku?.trim()) return false;
+            if (!this.form.brand?.trim()) return false;
+            if (!this.form.gtin?.trim()) return false;
+            if (!this.form.gtin_type) return false;
+
+            // Pricing
+            if (this.form.price === null || this.form.price === '' || this.form.price < 0) return false;
+            if (!this.form.currency) return false;
+            if (this.form.tax_rate_percent === null || this.form.tax_rate_percent === '') return false;
+
+            // Image
+            if (!this.form.primary_image_url?.trim()) return false;
+
+            return true;
+        },
+
+        /**
+         * Generate a unique vendor SKU
+         * Format: XXXX_XXXX_XXXX (includes vendor_id for uniqueness)
+         */
+        generateSku() {
+            const vendorId = this.product?.vendor_id || 0;
+
+            // Generate random alphanumeric segments
+            const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+            const generateSegment = (length) => {
+                let result = '';
+                for (let i = 0; i < length; i++) {
+                    result += chars.charAt(Math.floor(Math.random() * chars.length));
+                }
+                return result;
+            };
+
+            // First segment includes vendor ID (padded)
+            const vendorSegment = vendorId.toString().padStart(4, '0').slice(-4);
+
+            // Generate SKU: VID + random + random
+            const sku = `${vendorSegment}_${generateSegment(4)}_${generateSegment(4)}`;
+            this.form.vendor_sku = sku;
+
+            adminVendorProductEditLog.info('Generated SKU:', sku);
+        },
+
         /**
          * Save product changes
          */
         async saveProduct() {
+            if (!this.isFormValid()) {
+                Utils.showToast('Please fill in all required fields', 'error');
+                return;
+            }
+
             this.saving = true;
 
             try {
+                // Build translations object for API
+                const translations = {};
+                for (const lang of ['en', 'fr', 'de', 'lu']) {
+                    const t = this.form.translations[lang];
+                    // Only include if there's actual content
+                    if (t.title?.trim() || t.description?.trim()) {
+                        translations[lang] = {
+                            title: t.title?.trim() || null,
+                            description: t.description?.trim() || null
+                        };
+                    }
+                }
+
                 // Build update payload
                 const payload = {
-                    title: this.form.title || null,
-                    brand: this.form.brand || null,
-                    vendor_sku: this.form.vendor_sku || null,
-                    gtin: this.form.gtin || null,
-                    price_override: this.form.price_override ? parseFloat(this.form.price_override) : null,
-                    currency_override: this.form.currency_override || null,
-                    availability: this.form.availability || null,
+                    translations: Object.keys(translations).length > 0 ? translations : null,
+                    // Product identifiers
+                    vendor_sku: this.form.vendor_sku?.trim() || null,
+                    brand: this.form.brand?.trim() || null,
+                    gtin: this.form.gtin?.trim() || null,
+                    gtin_type: this.form.gtin_type || null,
+                    // Pricing
+                    price: this.form.price !== null && this.form.price !== ''
+                        ? parseFloat(this.form.price) : null,
+                    sale_price: this.form.sale_price !== null && this.form.sale_price !== ''
+                        ? parseFloat(this.form.sale_price) : null,
+                    currency: this.form.currency || null,
+                    tax_rate_percent: this.form.tax_rate_percent !== null && this.form.tax_rate_percent !== ''
+                        ? parseInt(this.form.tax_rate_percent) : null,
+                    // Image
+                    primary_image_url: this.form.primary_image_url?.trim() || null,
+                    // Status (is_digital is derived from marketplace product, not editable)
                     is_active: this.form.is_active,
                     is_featured: this.form.is_featured,
-                    is_digital: this.form.is_digital,
-                    description: this.form.description || null
+                    // Optional supplier info
+                    supplier: this.form.supplier?.trim() || null,
+                    cost: this.form.cost !== null && this.form.cost !== ''
+                        ? parseFloat(this.form.cost) : null
                 };
 
+                adminVendorProductEditLog.info('Saving payload:', payload);
+
                 await apiClient.patch(`/admin/vendor-products/${this.productId}`, payload);
 
                 adminVendorProductEditLog.info('Product saved:', this.productId);