Custom language files deleted during installation/update

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David Powell

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Sep 15, 2025, 9:16:57 AM (12 days ago) Sep 15
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Hi,

I have some custom translation files that traditionally I've added to the C:\Program Files (x86)\Inno Setup 6\Languages folder  (e.g. "compiler:\Languages\MyMessages.isl") as they are used by multiple scripts, however these custom files are now being deleted every time an update to Inno Setup is installed.

This could be seen as a bug, as an installer shouldn't (normally) be deleting files it didn't install when installing/uninstalling.

Perhaps Inno Setup should use an AppData and/or Program Data folder for global user language files, rather than having them in the installation folder, supported with a prefix like compiler: (e.g. compilerAppData: and/or compilerProgramData:)?

Cheers,
David
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