So, the string in question is currently marked as 'fuzzy' which means there's a translation but it's likely to be wrong so you shouldn't use it. When that happens, the default language (engilish) is displayed.
We are starting a new translation service which is about to go to end user trials, if you are interested, PM me for more details. This will hopefully help speed up and verify a lot more of the strings used within Cacti. In our translation service, the string below is translated in Chinese (Simplified) as:
(please note, I've kinda guess that was the language you are using based of what I could see below).
As a whole, Chinese is probably one of the better translated languages in core:
![Image](https://user-images.githubusercontent.com/9052188/54835805-cf79ba00-4cba-11e9-836e-32ec9aa80507.png)