Why do you want to change it?The language of the installer,Language Neutral is the default.So based on your UI language,if english, Language neutral is English.Say if an installers language is French or if there is nothing next to Language in the details, Windows Installer looks for resources in the following order:
1. Requested language
2. User's language
GetUserDefaultUILanguage
GetUserDefaultLangID
3. System's language (GetSystemDefaultLangID)
4. English
They all install in English for me
I dont know if Im following you correctly or if this helps at all.I imagine this would apply to making a program also if this is a screenshot of a program you made