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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/tchaikovsky_yes	2021-09-29	Post	7	English	English, Portuguese
u/thedolcevita4	2021-10-10	Post	7	English	English, Portuguese
u/sophiaontherun	2021-10-20	Post	7	English (C1)	English, Portuguese
u/einsstark	2021-10-21	Post	5	English	English
u/marco_italy1	2021-09-09	Post	5	English (C2)	English

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

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