For 10 points, name this group of languages sometimes connected to neighboring Baltic languages like Latvian and Lithuanian, many of which are written with Cyrillic and which include Macedonian, Serbian, Czech, and Russian.
One of these languages marks yes/no questions with the particle li. Forbidding consonant clusters resulted from the loss of the letter yer in this language group, which underwent a series of three Palatalizations. A medieval language in this group's southern branch was written in the Glagolitic alphabet and known as its "Old Church" type. These languages had a heavy influence on nearby Romanian. For 10 points, name this group of languages sometimes connected to neighboring Baltic languages like Latvian and Lithuanian, many of which are written with Cyrillic and which include Macedonian, Serbian, Czech, and Russian.
One of these languages marks yes/no questions with the particle li.
Slavic languages [or Slavonic languages; accept Balto-Slavic languages"; accept South Slavic languages until "southern"]