[Waiting for user feedback] If I can smoothly change Language URL format ,after I translated all webpage

You can change your site’s language URL at any time by going to WPML → Languages.

If you’d like to set up your site so that each language uses its own domain (for example, example.com for English and example.fr for French), you’ll need to follow this guide:
https://wpml.org/documentation/getting-started-guide/language-setup/language-url-options/how-to-use-wpml-with-different-domains-per-language/#how-to-enable-different-languages-per-domain

Please note that configuring multiple domains requires adjustments in your domain registrar and hosting settings, which we’re not able to assist with directly.

Once the language URLs are set up, all dynamic links (such as menu items) will work automatically. If you’ve added any hard-coded URLs in your content, those would need to be updated manually or by using a plugin such as Better Search Replace.

If you disable this validation checkbox and save, does the other domain work?

Also, do both of your domains pass this test?
https://wpml.org/documentation/getting-started-guide/language-setup/language-url-options/how-to-use-wpml-with-different-domains-per-language/#testing-if-the-domains-are-set-properly

Please provide me with WordPress credentials so I could investigate the issue directly.

https://wpml.org/purchase/support-policy/privacy-and-security-when-providing-debug-information-for-support/

I marked your next reply as private so that you can safely add credentials.