Bulk creation variations for all products in Woocommerce

All simple products (627) need to be converted to variable products with 3 possible attributes. This will not effect the price. The atributes are already created. The shop is made in three languages (dutch, english, french). The atributes are already translated, so this should work in all 3 tlanguages. There's one categorie where the products already are variable products (with 2 different prices), the 3 extra attributes should be added here as well.