Members of this group und
Members of this group underwent the "loss of the yers," and this Satem group includes South, East, and West branches, with some member of the West branch, such as Kashubian, being grouped  together as Lekhitic. This group's parent language developed from the same tongue as did (*) proto-Baltic. For 10 points— name this group of Indo- European languages that includes Macedonian, Czech, Russian, and Polish.
Members of this group underwent the "loss of the yers," and this Satem group includes South, East, and West branches, with some member of the West branch, such as Kashubian, being grouped  together as Lekhitic.
Slavic or Slavonic languages