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| English | Russian |
| Bulgarian Catholic Church | Болгарская католическая церковь (An Eastern Catholic church of the Byzantine rite, in communion with Rome since 1859) |
| Bulgarian chant | болгарский распев (Repertory of liturgical melodies that came from Bilgaria and remain in the Russian liturgical books) |
| Bulgarian Orthodox Church | Болгарская православная церковь (One of the national churches of the Eastern Orthodox communion) |