venäläisessä
The word "venäläisessä" is the inessive case of the Finnish adjective "venäläinen". "Venäläinen" translates to "Russian" in English and refers to something or someone related to Russia, its people, or its language. The inessive case suffix "-ssä" indicates a location within or inside something. Therefore, "venäläisessä" means "in the Russian (thing/place/etc.)" or "within the Russian (context)".
For example, if one were to say "kirja on venäläisessä kirjakaupassa", it would translate to "the book