Chechens
The main language of the Chechen people is Chechen. Chechen belongs to the family of Nakh languages (Northeast Caucasian languages). Literary Chechen is based on the central lowland dialect. Other related languages include Ingush, which has speakers in the neighbouring Ingushetia, and Batsbi, which is the language of the people in the adjoining part of Georgia. At various times in their history, Chechens used Georgian, Arabic and Latin alphabets; as of 2008, the official one is now the Cyrillic script of Russia.
Ossetians
The Ossetians or Ossetes (; , '; дигорæ, дигорæнттæ, ') are an Iranian ethnic group of the Caucasus Mountains, indigenous to the ethnolinguistic region known as Ossetia.
They speak Ossetic, an Eastern Iranian (Alanic) language of the Indo-European languages family, with most also fluent in Russian as a second language. The Ossetian language is neither closely related to nor mutually intelligible with any other language of the family today. Ossetic, a remnant of the Scytho-Sarmatian dialect group which was once spoken across the Pontic–Caspian Steppe, is one of the few Iranian languages inside Europe.