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In page Ukrainian language:

"

Borys Hrinchenko used some corrections in the fundamental four-volume Dictionary of the Ukrainian Language (1907–1909). Most of the spelling rules (practically based on phonetics – "write as you hear") used in Hrinchenko's dictionary are still valid. Hrinchenko's work became an informal spelling and model for Ukrainian writers and publications from 1907 until the creation of the first official Ukrainian spelling in 1918.[citation needed]