The language controls on the WooCommerce Products page are hidden by default. When enabled, they can increase the loading time of the page.
The recommended place for translating products is from the WooCommerce Multilingual products dashboard. The dashboard and the Products tab can be reached in the WordPress administration area, by going to the WPML->WooCommerce Multilingual page.
You can enable language controls from the Screen Options menu at the top of the WooCommerce Products page.