Question regarding fannon Vs. Cannon

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I've been collecting loads of hetalia fanart and I've noticed how many characters seem to reappear in art done by different artists. My question is whether characters like Vietnam, Tibet and Cuba are Canon characters or just in the Fanon. Since I don't read Japanese I'm having a hard time figuring this out. If they are canon could anyone give me any info on them, that would be great.
ps: I really don't expect much info about Tibet

Comments

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I like Cuba, so that pleases me. Maybe there is hope yet for Vietnam, was a pretty important event.