He received his early education at home and through private tutors who included Ernst Moritz Arndt, Hermann Baier, and Karl Lappe.
From 1812 he studied Oriental languages in Paris attending the lectures of Silvestre de Sacy.
Kosegarten later moved to the University of Greifswald where he specialized in Old Testament exegesis and oriental languages.
[2] Kosegarten is remembered for translation and edition of Arabic, Persian and Sanskrit poems, songs and fables.
His handwritten notes and collection of German and Oriental works were bequeathed to the University of Greifswald.