Hello,
It sounds like you're facing a common issue with AJAX comments on your Drupal multilingual site: an "HTTP error 0" when users try to post comments on non-English pages (like Japanese or Chinese). This usually points to a JavaScript error or an incorrect AJAX callback URL specific to the translated paths. The comment actually posts, but the error message and page freeze are a definite problem. To fix this, you'll need Prepaid Card Status to inspect your browser's developer console for JavaScript errors and network request issues when the problem occurs. Also, verify your ajax_comments module settings and Drupal's core multilingual configuration to ensure paths and translations are handled correctly for AJAX requests.