Slavic
The Russian language belongs to the East Slavic family of languages. Its brother languages are Ukrainian, Belarusian and Rusyn. The East Slavic is part of the Slavic languages.

It goes like this.

- Indo European

- Proto Slavic

- Slavic

- East Slavic

- Russian

Slavic people speak Slavic languages. Some of the most common are:

1. Russian
   
2. Polish
   
3. Czech
   
4. Slovak
   
5. Bulgarian
   
6. Ukrainian
   
7. Belarussian
8. Rusyn
9. Slovenian
   
10. Bosnian
    
11. Croatian
    
12. Montenegrin
    
13. Macedonian
    
14. Church Slavonic

Furthermore, some Slavic people speak non-Slavic languages as well, particularly:

1. English
   
2. German
   
3. Romanian
   
4. Hungarian
   
5. French
   

Yes it is. More specifically it is a Slavic language from the Slavic-Baltic category of the Indo-Europeanlanguages.

Other Slavic languages include: Ukrainian, Belarusian, Rusyn, Polish, Slovak, Czech, Serbian, Croatian, Bosnian, Macedonian, Bulgarian, Montenegrin, etc.

Other Slavic-Baltic languages include: Latvian and Lithuanian.

Other Indo-European categories include: Germanic languages, Celtic, languages, Italic languages, Indo-Iranian languages, and the Armenian, Albanian, and Greek languages.