Cyrillic

Bulgarian is written using the Cyrillic script, one of the major writing systems of Eastern Europe and the Slavic world. The Bulgarian Cyrillic tradition developed from the work of the First Bulgarian Empire during the 9th and 10th centuries CE, where early Slavic literary schools refined and standardized the script based on earlier Glagolitic and Greek influences.

Ukrainian is written using the Cyrillic script, a writing system that developed in the 9th–10th centuries and later adapted for East Slavic languages. The modern Ukrainian alphabet evolved from earlier Church Slavonic and Russian-influenced orthographies but became standardized in its current form in the late 19th and early 20th centuries.

Serbian is written using both the Cyrillic and Latin alphabets, making it one of the few modern languages with two fully standardized writing systems used interchangeably in daily life. The Serbian Cyrillic alphabet was formally reformed in the 19th century by linguist Vuk Karadžić, who designed it around a simple principle: write as you speak, read as it is written.

Mongolian is written using a modified form of the Cyrillic script, officially introduced in 1946 for use in the Mongolian People’s Republic. This writing system replaced the traditional Mongolian vertical script in everyday administration and education, aligning the language more closely with Soviet-era linguistic reforms.

Macedonian is written using a standardized form of the Cyrillic script, officially codified in 1945 following the establishment of modern Macedonian as a distinct South Slavic language. The alphabet was designed to closely match the phonetics of spoken Macedonian while removing redundant letters found in older Slavic orthographies.

Kazakh is written using a modified version of the Cyrillic script, adapted during the 20th century when Kazakhstan was part of the Soviet Union. The modern standardized Kazakh Cyrillic alphabet was officially established in 1940 to better represent the phonetics of the Kazakh language.

Belarusian is written using the Cyrillic script, a writing system that developed in Eastern Europe during the 9th century CE. The script originated from the work of early Slavic scholars connected to the Byzantine cultural sphere and was designed to represent the sounds of Slavic languages more accurately than the Greek alphabet alone.

Russian is a Slavic language written using the Cyrillic alphabet, a script that originated in the 9th century and was developed to represent the sounds of early Slavic languages. The modern Russian alphabet consists of 33 letters, including both consonants and vowels, as well as characters that modify pronunciation, such as the soft sign (ь) and hard sign (ъ). Its distinctive letterforms set it apart visually from the Latin alphabet used in English.

The Cyrillic alphabet, an iconic writing system renowned for its distinctive appearance, finds its roots in the 9th century. Created by two Byzantine brothers, Cyril and Methodius, the alphabet was devised to translate religious texts into the Slavic languages of the region. Its name Cyrillic honors the elder brother, Cyril, who is credited with the alphabet's initial development.