This is the 7828th most frequent Swedish word.
uno
"Uno" is not a Swedish word; it is a Spanish masculine name and also the name of a card game.
Here 'Uno' is a proper noun, commonly used as a first name in Swedish.
Uno är min vän och han bor i Stockholm.
Uno is my friend, and he lives in Stockholm.
In this sentence, 'Uno' refers to the name of the popular card game.
Vi spelade Uno hela kvällen med familjen.
We played Uno the whole evening with the family.
'Uno' in this context is not standard Swedish; if intended to mean 'one', the correct term would be 'man'. It might be a typo or a non-standard usage.