I check on his
BPIP, there was no changed email or password, only woke up.
Then I try to google, AI give this answer.
Yes, Croatians can generally understand Serbian and vice versa.
Yes, many Croatians can speak German. German is the second most common non-native language in Croatia, after English.
Based on your post, it's like he can speak German well, but he's a shitposter isn't? what if we wait for him to make a post in Croatian and Serbian languages.