Hi Torvista,
thanks for your answer.
You suggestion did work even if partially.
Now the à is à and the ' is '
I tested the feed uploading to Google Merchant and none of the products was refused, while before all the one containing the other coding was.

I wonder if then in the description the &agrave will be shown as à or not.

I am reluctant in deleting my actual feed and load the new one because it takes a long time before google approves the products for ads.

On the other end, I do not understand why none of the products in my actual feed are approved for product search bearing the hourglass even if more then 24 hours are gone by since the last upload.

Ciao

enzo