I understand the issue you're having and will try my best to assist you in this matter.
The 404 error usually appears due to a corrupted permalink structure. Please try the following steps and check if that helps to solve the issue.
- Please go to "Settings > Permalinks" from your WordPress Dashboard
- Resave the structure without making any changes
- Now, go to "WooCommerce > WooCommerce Multilingual > Products" and ensure that the product is translated into the English language.
- Clear the caches from the site and browser then check again.
I hope it will help. Feel free to let me know if you need further assistance. I will be happy to help.
A redirection appears to be configured within the site, which is mainly causing the problem. Please try the following steps and check if that helps to solve the issue.
- Take a full backup of the site including the database
- If any redirection is set manually, remove them as well.
- Navigate to the root directory of your site using the File Manager in your hosting control panel.
- You'll find a file name '.htaccess'. Open the file in Editor.
- Copy the contents within it and save it on your Computer
- Now, replace the htaccess rules with the default rule mentioned here: https://wordpress.org/documentation/article/htaccess/#basic-wp
- Save the changes.
- Now, access the WordPress admin and Switch to the English language
- Go to the 'Products > All Products' section and open the 'baby seat belt' product in the editor
- Ensure that the product slug is configured correctly.
Let me know how it goes. I will be happy to help if you need further assistance in this matter.