Release notes localization on Windows

[ananya-pathak-sndk]

Can someone please confirm whether localization of release notes in the app update dialog works on Windows?

I am using WinSparkle via the auto_updater Flutter package and relying on the default Windows update dialog (no custom UI).

I have tried the following approaches but ran into the issues listed below.

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Multiple <releaseNotesLink xml:lang="…"> in appcast.xml

• The URLs get concatenated into a single string.
• No language selection occurs.

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Resolver approach (single URL + JS-based language selection)

• <releaseNotesLink> points to an HTML page that uses JavaScript (navigator.language) to redirect to a localized HTML file.
• The redirect causes the content to open in the external browser instead of rendering inside the WinSparkle dialog.

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Additional observation

• A single static HTML URL in <releaseNotesLink> renders correctly inside the update dialog.

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If localization of release notes is not supported on Windows, could someone please confirm this and share the recommended or supported approach (if any)?

Thanks in advance.