Because this is Windows software it is okay for a file to not have an ending newline. If you edit such a file please keep it that way.
So that they can be uploaded to Transifex there are two encodings of the localization files. UTF8 as required by Transifex, and usually-ANSI, as required by InnoSetup.
To convert between them see convert-inno-setup.
Also see https://github.com/hyphanet/sign-windows-installer
See .github/workflows/ci.yml
(you can re-trigger a run to get the most recent freenet files into the installer)