@fluffy2560
In the 1960 - 1980's there were Cubans who arrived to Hungary as some sort of "socialist friendship".
Many among them were women who worked in Hungarian clothing factories. A way to remain here (instead to return Cuba) was to get married/ create a family.
Compared with like German, Romanian, Serbian, etc... (+Hungarian) family unions close to nothing in numbers.
Personally I know about just 3.
Vietnam that is different, they hardly mixing.
But as a funny thing in the late 2000's I get an offer to marry a Vietnamese woman on paper for a good sum of money, so was able to laught long untill the "paper guy" realized that clearly asked the wrong candidate.