how to do?

This is probably a translation mistake, as the source code seems fine here. What language is are you using? Then we can check that language and suggest an improvement.

As it is a warning only, not an error, you can safely ignore it. As it is not recommended to have debugging enabled on a live site, I would also recommend to disable debugging.

Chinese

I see three variants: Taiwan, Hongkong, or China?

in china

Someone added a bad translation, with too many %s (placeholders) in the text. I have just corrected this. If you update your translations the error should be gone.

ok，thanks