I helped a Chinese translation…

I helped a Chinese translation of a wp-statistics pluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory https://wordpress.org/plugins/ or can be cost-based plugin from a third-party, I found some terms (ex.
Word, City, Referrer …) are not translated in the plugin dashboard, still in English, but I’m sure I translated them in the plugin translation page, I checked wp-statistics-zh_TW.po in my site (already synced), but I can’t find those terms in this file, so what’s the root cause ?