This thread is resolved. Here is a description of the problem and solution.
Problem: Do you have any suggestion how to refresh all product translation quickly?
Solution: 1. WooCommerce -> WooCommerce Multilingual -> Settings and temporarily change to using the native WordPress editor.
2. Then, click "Products" in your dashboard menu. Use the language switcher at the top of your page to switch to your secondary language.
3. Then, in the drop-down menu for bulk actions, select "edit". Then edit the first product (or just click update). This should update the selected products.
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