Hello, just to let you know - the little flag shown next to the hints in my vocabulary is not Czech (although the caption in the LingQing dialog is “Czech”), it is (probably) Luxembourg. It’s not a big deal, but it is also easy to fix.
Thanks for the heads up. That’s fixed now.
That was the flag of Yugoslavia after 1992, then of Serbia and Montenegro until 2006.
… or the so-called “Pan-Slavic” flag