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Všetkým blahoželám!
Congratulations to all!
Blahoželám ti!
Congratulations to you!
Blahoželám, vyhrali ste!
Congratulations, you won!
Blahoželám k vášmu výročiu.
Congratulations on your anniversary.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Example sentences from Tatoeba (CC BY 2.0 FR).
Full attribution on References.