Belorussianism

noun2

1. •
   An expression or characteristic peculiar to the Belarusian language.

   • KUL 378 is early among Burcev manuscripts (see Appendix, no. A-1). Variation is largely expected to be restricted to phonetic and orthographic Ukrainianisms and Belorussianisms such as […] — 1987
2. •
   Support for hegemony of Belorussian identity.