Google Merchant warns of "Unrecognized attribute"

Question

Google Merchant warns of "Unrecognized attribute"

I am facing a problem that I cannot explain:

When I upload a feed to Google Merchant in a language other than English, the reports say that there are many “unrecognized attributes” that must be valid, such as title ,, description , gtin , etc.

In fact, all attributes are considered a warning from Google. But the problem arises if it is not in English, so my feed seems correct.

What's wrong? Do you have any ideas?

Thank you for your help.

Here's a dump of my export (tied to a single product):

<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:g="http://base.google.com/ns/1.0" version="2.0">
<channel>
<title>Google Shopping export for PrestaShop</title>
<item>
<g:id xmlns:g="http://base.google.com/ns/1.0">12345</g:id>
<title>
<![CDATA[ Basic title ]]>
</title>
<link>
<![CDATA[
https://www.example.com/test
]]>
</link>
<description>
<![CDATA[
This is a basic product
]]>
</description>
<g:quantity xmlns:g="http://base.google.com/ns/1.0">39</g:quantity>
<g:availability xmlns:g="http://base.google.com/ns/1.0">
<![CDATA[ in stock ]]>
</g:availability>
<g:price xmlns:g="http://base.google.com/ns/1.0">8.54 EUR</g:price>
<g:product_type xmlns:g="http://base.google.com/ns/1.0">
<![CDATA[ Ofertas > Ofertas ]]>
</g:product_type>
<g:google_product_category xmlns:g="http://base.google.com/ns/1.0">
<![CDATA[
Alimentaci&oacute;n, bebida y tabaco &gt; Bebidas &gt; Vino
]]>
</g:google_product_category>
<g:shipping_weight xmlns:g="http://base.google.com/ns/1.0">1.4 kg</g:shipping_weight>
<g:online_only xmlns:g="http://base.google.com/ns/1.0">n</g:online_only>
<g:condition xmlns:g="http://base.google.com/ns/1.0">new</g:condition>
<g:brand xmlns:g="http://base.google.com/ns/1.0">Angove Family Winemakers</g:brand>
<g:mpn xmlns:g="http://base.google.com/ns/1.0">23500023</g:mpn>
<g:gtin xmlns:g="http://base.google.com/ns/1.0"/>
<identifier_exists>FALSE</identifier_exists>
<g:image_link xmlns:g="http://base.google.com/ns/1.0">
<![CDATA[
http://example.com/test/images/1.jpg
]]>
</g:image_link>
<g:shipping xmlns:g="http://base.google.com/ns/1.0">
<g:country>ES</g:country>
<g:service>
<![CDATA[ ENVIALIA-72H ]]>
</g:service>
<g:price>24.2 EUR</g:price>
</g:shipping>
</item>
</channel>
</rss>