But Pachopka 's grammar was reportedly taught in an unidentified number of schools , from 1918 for an unspecified period , .
Nyekrashevich considered Pachopka 's grammar unscientific and ignorant of the principles of the language .
Pachopka 's grammar was reportedly taught in an unidentified number of schools , from 1918 for an unspecified period , .
Nyekrashevich considered Pachopka 's grammar unscientific and ignorant of the principles of the language .