James David Bourchier,
1911 Encyclopædia Britannica, Volume 4…
(1911)
“ Language.—The Bulgarian is at once the most ancient and the most modern of the languages which constitute the Slavonic group. In its groundwork it presents the nearest approach to the old ecclesiastical Slavonic, the liturgical language common to all the Orthodox Slavs, but it has undergone more important modifications than any of the sister dialects in the simplification of its grammatical forms ”
