You would like to modify how what language the endpoint agent response rule popup's display in.
Such as the Title Bar, Banner, and user response check box.
The initial text in the body is specified by the +Language section of the related response rule, if the the response rule is triggered on a system that does not match the +Language, then the response rule "text" will default to English.
Change the system locale to the language of your choice using these instructions:
Change the System Locale for Windows XP, Vista and Windows 7 Note: You must be logged in with an account that has Administrative Privileges.
Click Start > Control Panel.
For Windows 7 and Vista: Click Clock, Language and Region > Region and Language. For Windows XP: Double click the Regional and Language Options icon. The Regional and Language Options dialog box appears.
For Windows 7: Click the Administrative tab. For Windows XP and Vista: Click the Advanced tab. (If there is no Advanced tab, then you are not logged in with administrative privileges.)
Under the Language for non-Unicode programs section, select the desired language from the drop down menu.
Click OK. The system displays a dialog box asking whether to use existing files or to install from the operating system CD. Ensure that you have the CD ready.
Follow the guided instructions to install the files.
Restart the computer after the installation is complete.