Yep, it's a problem of the font.
I'll check if the full font file contains greek characters and I'll let you know.
Thanks!

I fixed the font problem but I noticed that in some points some greek sentences seems too long and they go on a new line.
For the first picture, could you try using a shorter sentence to convey the same meaning?
For the second picture, I'll try to do something myself.
(It's weird what's happening because in the first case, for example, the Turkish sentence is longer but it displays without problem in the same amount of space)

Thank you for the swift response. Checking, and I will revert with an update.

I've rewritten the sentence in various ways, it seemed to me character "Θ" was causing this, but it was strange in any case. Also there are longer sentences in Greek, so I suppose it has to do with the font and this specific character.
It seems it's displayed properly now.

Thanks.
I'm wondering why you are seeing those black rectangles instead of the palettes pictures...
Which system are you using? Can you correctly see the country flags?

I use Arch Linux. This is on the main branch, if I build the application using the glow-renderer branch as you suggested in README.md, then everything is displayed properly.

If you can confirm everything is now ok, I'll proceed merging the PR

Seems ok, you can proceed.

@all-contributors please add @abousis for translation.

@GyulyVGC

I've put up a pull request to add @abousis! 🎉