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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/sleepgoodbooksbetter	2021-01-07	Post	`8`	English, Portuguese	Spanish
u/hffhyeu	2020-11-24	Post	`8`	English, Portuguese	Spanish
u/atsuofc	2021-02-01	Post	`8`	English (C1), Portuguese	Spanish
u/_salacia	2021-01-09	Post	`8`	English, Portuguese (Native)	Spanish
u/esssjsiofksjdodks	2021-02-03	Post	`8`	English, Portuguese	Spanish

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