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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/jcpa2	2020-07-29	Post	`7`	Spanish (Native)	English, Russian
u/jahmajo09	2020-08-15	Post	`7`	Spanish	English, Russian
u/jozapata	2020-07-11	Post	`5`	Spanish	English
u/sgwsonee	2020-08-31	Post	`5`	Spanish (C1)	English
u/alexl23	2020-06-29	Post	`5`	Spanish	English

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