强制Dia使用英文zz
1.2.16. How do I use Dia in English (or other language) when my Operating System is set to a different language

The recommended way to change the language in Dia is to change the Operating System language and Dia will follow the default.

However, many people have asked if they can use Dia in a language other than the current set default language. If the language you want is English, the easiest approach is to move or remove the language files (.mo) and allow the default English to show through instead.

There is also a slightly more complicated approach whereby you set the locale variable on the command line.