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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/st-nikolas	2025-03-10	Post	`5`	Russian (Native)	German
u/fabulous-ad6830	2025-01-08	Post	`5`	Russian	German
u/feisty_comb	2025-02-08	Post	`5`	Russian	German
u/the_potato_cat_	2025-01-27	Post	`5`	Russian (Native)	German
u/funny_mongoose_7671	2025-01-12	Post	`5`	Russian	German

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