To narrow down what is causing the issue, I would first want to know what steps you already tried to try to resolve the issue. As the error message suggest, did you try testing for a plugin conflic? If not, you can do this by deactivating all third party plugins, and seeing if the problem remains. If it’s fixed, you’ll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.
It could also be related to customizations, do you have additional functions in your functions.php and/or custom scripts in your Global JS?
I would also like to know how you translated your pages. Did you use the language icons in the lower right hand corner?
Below are additional general solutions you could try. Some of it might not be related to this issue but might prevent future errors:
Clear all caches including browser cache then deactivate your caching plugins and other optimization plugins.
If you’re using a CDN, please clear the CDN’s cache and disable optimization services.
Reset your htaccess file by renaming it to
.htaccess-bak. Then in WP Admin Menu, go to Settings > Permalinks and just click the Save Changes button.
Contact your host to increase your allocated memory or do it yourself by adding this code in your wp-config.php
define( 'WP_MEMORY_LIMIT', '256M' );
define( 'WP_MAX_MEMORY_LIMIT', '512M' );