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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/aimames	2021-01-27	Post	`7`	Russian (Native)	English, Spanish
u/old_wine_and_cheese	2021-01-29	Post	`7`	Russian	English, Spanish
u/glushko_serg	2020-12-19	Post	`7`	Russian	English, Spanish
u/marsellaft	2021-03-03	Post	`7`	Russian (Native)	English, Spanish
u/valdemar0204	2021-03-03	Post	`7`	Russian	English, Spanish

Please feel free to comment on the above posts to get in contact with their authors.