To import multilingual variable products with WP All Import and WPML, you need to start with adding a Unique Identifier column to your spreadsheets. This allows WPML All Import to link your variable products with their translations. It is important that you use an ID number, not the SKU or other custom fields.
Next, you should import any taxonomies, including variable attributes, to your site. After this you can import the multilingual variable products.
