This is the 16452nd most frequent Russian word.
русскоязычных
"Russian-speaking."
Here, 'русскоязычные' is used as a noun referring to individuals who speak Russian as their primary language.
Многие русскоязычные живут за пределами России.
Many Russian-speaking people live outside of Russia.
In this sentence, 'русскоязычные' describes students who are characterized by their ability to speak Russian, used as an adjective.
Русскоязычные студенты используют дополнительный материал для изучения истории.
Russian-speaking students use supplementary materials to study history.
Here, 'русскоязычных' modifies 'сообществ', emphasizing the linguistic identity of these communities.