diff --git a/prerender/seo/feeds.cjs b/prerender/seo/feeds.cjs
index 3192633..49567f4 100644
--- a/prerender/seo/feeds.cjs
+++ b/prerender/seo/feeds.cjs
@@ -248,9 +248,9 @@ const generateProductsXml = (allProductsData = [], baseUrl, config) => {
   let productsXml = `<?xml version="1.0" encoding="UTF-8"?>
 <rss xmlns:g="http://base.google.com/ns/1.0" version="2.0">
   <channel>
-    <title>${config.descriptions.short}</title>
+    <title>${config.descriptions.de.short}</title>
     <link>${baseUrl}</link>
-    <description>${config.descriptions.short}</description>
+    <description>${config.descriptions.de.short}</description>
     <lastBuildDate>${currentDate}</lastBuildDate>
     <language>de-DE</language>`;
 
@@ -308,6 +308,11 @@ const generateProductsXml = (allProductsData = [], baseUrl, config) => {
 
   // Add each product as an item
   allProductsData.forEach((product, index) => {
+
+    console.log('DEBUG '+JSON.stringify(product, null, 2));
+
+
+
     try {
       // Skip products without essential data
       if (!product || !product.seoName) {
@@ -360,15 +365,33 @@ const generateProductsXml = (allProductsData = [], baseUrl, config) => {
         const length = digits.length;
         let sum = 0;
 
-        for (let i = 0; i < length - 1; i++) {
-          // Even/odd multiplier depends on GTIN length
-          let multiplier = 1;
-          if (length === 8) {
-            multiplier = (i % 2 === 0) ? 3 : 1;
-          } else {
-            multiplier = ((length - i) % 2 === 0) ? 3 : 1;
+        if (length === 8) {
+          // EAN-8: positions 0-6, check digit at 7
+          // Multipliers: 3,1,3,1,3,1,3 for positions 0-6
+          for (let i = 0; i < 7; i++) {
+            const multiplier = (i % 2 === 0) ? 3 : 1;
+            sum += digits[i] * multiplier;
+          }
+        } else if (length === 12) {
+          // UPC-A: positions 0-10, check digit at 11
+          // Multipliers: 3,1,3,1,3,1,3,1,3,1,3 for positions 0-10
+          for (let i = 0; i < 11; i++) {
+            const multiplier = (i % 2 === 0) ? 3 : 1;
+            sum += digits[i] * multiplier;
+          }
+        } else if (length === 13) {
+          // EAN-13: positions 0-11, check digit at 12
+          // Multipliers: 1,3,1,3,1,3,1,3,1,3,1,3 for positions 0-11
+          for (let i = 0; i < 12; i++) {
+            const multiplier = (i % 2 === 0) ? 1 : 3;
+            sum += digits[i] * multiplier;
+          }
+        } else if (length === 14) {
+          // EAN-14: similar to EAN-13 but 14 digits
+          for (let i = 0; i < 13; i++) {
+            const multiplier = (i % 2 === 0) ? 1 : 3;
+            sum += digits[i] * multiplier;
           }
-          sum += digits[i] * multiplier;
         }
         const checkDigit = (10 - (sum % 10)) % 10;
         return checkDigit === digits[length - 1];
@@ -397,8 +420,12 @@ const generateProductsXml = (allProductsData = [], baseUrl, config) => {
         return;
       }
 
+      // Get description from the appropriate field
+      // TODO: Identify the correct field name used by the product data
+      const productDescription = product.shortDescription || product.longDescription || product.description || '';
+
       // Check if description is missing or too short (less than 20 characters) - skip if insufficient
-      const originalDescription = product.description ? cleanTextContent(product.description) : '';
+      const originalDescription = productDescription ? cleanTextContent(productDescription) : '';
       if (!originalDescription || originalDescription.length < 20) {
         productsNeedingDescription.push({
           id: product.articleNumber || product.seoName,
@@ -411,8 +438,8 @@ const generateProductsXml = (allProductsData = [], baseUrl, config) => {
       }
 
       // Clean description for feed (remove HTML tags and limit length)
-      const rawDescription = cleanTextContent(product.description).substring(0, 500);
-      const cleanDescription = escapeXml(rawDescription) || "Produktbeschreibung nicht verfügbar";
+      const feedDescription = cleanTextContent(productDescription).substring(0, 500);
+      const cleanDescription = escapeXml(feedDescription) || "Produktbeschreibung nicht verfügbar";
 
       // Clean product name
       const rawName = product.name || "Unnamed Product";