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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/outsideraspberry2782	2023-09-22	Post	5	English	Portuguese
u/fresh_magician2856	2023-07-24	Post	5	English (Native)	Portuguese
u/maximum-me	2023-07-31	Post	5	English (B2)	Portuguese
u/reasonablevariation8	2023-08-05	Post	5	English	Portuguese
u/mcreydest	2023-09-19	Post	5	English	Portuguese

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

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