Only Russian.
There is a whole genre of crazy Czech comedies from the 60ies which are even better than the wellknown Japanese crazy comedies.
Hungarian movies from the 70ies were the best in the world, likewise Romanian neorealistic movies starting with the Death of Mr Lazetescu end of the 90ies. Poland dominated the 80ies.
Russian movies from the Petersburg producer group around Balabanov were outstanding in the 00ies. Still very influential.
https://en.wikipedia.org/wiki/The_Golden_Calf_(1968_film)
https://en.wikipedia.org/wiki/The_Diamond_Arm
https://en.wikipedia.org/wiki/Operation_Y_and_Shurik%27s_Oth...
https://en.wikipedia.org/wiki/Kidnapping,_Caucasian_Style
I can go on and on ;).
Teach me about those, please.
Hausu the most famous, Crazy family was even in the theaters worldwide. Sion Sono is every year in your next film festival (Love Exposure his best), and many many batshit crazy small films. Like the crazy Czech comedies from the 60ies, my favorite being "Who killed Jessie". But also the crazy polish scifi comedies.