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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/inquisitivegoat	2020-10-07	Post	10	Greek, English	Greek, English
u/quintet-magician	2020-08-14	Post	8	Greek, English (C1)	English
u/parid369	2020-08-10	Post	6	Greek, English	---
u/weirdo696969	2020-07-19	Post	6	Greek, English	---
u/67potatoes	2020-09-17	Post	6	Greek (Native), English (C2)	---

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

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