I'm marking this old thread as resolved.
For the record - I believe this was the result of of a misundertanding. The information at P5825, was posted by zhuyifei1999 there in 2017. These are not all about Intuition or translatewiki.
Only 1 line concerns translatewiki.net or Intution, and that is the line you quoted:
This means that the documentation portal for Intuition at https://intuition.toolforge.org/#tab-about, was including a little image with a graph from translatewiki.net.
It does not affect any tool on Toolforge that uses Intuition to localise itself. I have removed the image in this commit, which removed the warning from the About page.