Steps to reproduce
- Change search language to either Traditional Chinese or Simplified Chinese
- Pick any Chinese article
- When article has been loaded, head to the bottom to find the About this page section
- Clicks on the Available in X other languages, and you can compare the actual amount of available languages with the counts displayed on the clickable button.
The counts should be the same
The counts in the list are actually containing one more language (either zh-hant or zh-hans). See the reference here: T176161