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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/disastrous_end2557	2023-02-13	Post	`7`	English	Arabic, German
u/jean-olaf	2023-02-15	Post	`7`	English	Arabic, German
u/themostmemed	2023-02-25	Post	`7`	English (Native)	Arabic, German
u/orchiskaididymus	2023-03-08	Post	`7`	English	Arabic, German
u/aboxingbitch	2023-04-09	Post	`7`	English	Arabic, German

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