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Russian

In a sentence
Tento spisovateľ je Rus.
This writer is Russian.
Ste Rus?
Are you Russian?
Som Rus.
I'm Russian.
Môj spolužiak je Rus a učí sa slovenčinu.
My classmate is Russian and is learning Slovak.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Includes Tatoeba example sentences when present.
Full attribution on References.