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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/basel_kouz	2021-11-20	Post	`6`	---	Arabic, German, English
u/medicatedpeacefulhug	2021-10-03	Post	`4`	---	German, English
u/las3v	2021-09-19	Post	`4`	---	German, English
u/martinking84	2021-09-28	Post	`4`	---	German, English
u/judit48	2021-10-02	Post	`4`	---	German, English

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