Problem: The client reported that their website was displaying posts in English when clicking the 'load more' button, even though the default language of the page was set to Chinese (zh-hans). Solution: We suggested the client to try a specific solution related to WPML rewriting the .htaccess file, which could potentially resolve the issue of posts loading in the incorrect language. The detailed steps can be found here: WPML Forum Post.
If this solution does not resolve your issue, or if it seems outdated or irrelevant to your case, we highly recommend checking related known issues at WPML Known Issues, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. Should you need further assistance, please do not hesitate to open a new support ticket at WPML Support Forum.