It could be a compliment of course, like "wow, this stuff is amazing tech wizardry that should be much more appreciated, and probably would be if not for the language barrier!"
Let's just agree that natural languages are too fuzzy and ambiguous and assume good faith.
Major part of old-timers (from Rebol era) in our community are indeed Czech people, but Red development was initiated in France, moved to China, and now bridges people across the whole Europe.
Putting such emphasis on nationality without any clear reason IMO looks strange and raises my eyebrow, to say the least.
> To be “a real Christian” is a compliment, but to be “a real Jew” is considered an insult.