I tried using CGE Localization in my project, but I got a problem. The application using this localization method doesn’t work on Android. Upon launch, the application immediately minimizes and that’s it.
The problem also reproduces in the example castle-engine/examples/localization/gettext at master · castle-engine/castle-engine · GitHub
Thank you for reporting, fixed in this commit 
I could reproduce the problem, and then test the fix, on the example you pointed out.
As usual, our downloads will soon contain the fix after it passes automatic tests. You can watch this page, when it will no longer show the commit “We need seekable stream for TMOFile, so use soForceMemoryStream …” then that fix is part of the downloads.