Verify grub modules and fonts

It doesn't seem to verify grub modules even though README claims it. Am I missing something?
I'm also thinking about fonts. How do you handle them?

I tried to workaround the issue with grub-mkstandalone but it didn't work with secure booting. Probably the problem is that SELoader doesn't support separated filesystems. Right?

Is it enough to embed all needed modules with grub-mkimage?