I found the following users who may fit your language exchange criteria:

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/lordmunchu	2020-07-02	Post	`5`	English	Russian
u/jeenzzo	2020-06-22	Post	`5`	English	Russian
u/wellthatshitworked	2020-08-05	Post	`5`	English	Russian
u/xsid06	2020-07-17	Post	`5`	English (Native)	Russian
u/sank_ar_ps	2020-06-30	Post	`5`	English	Russian