Final nūn in min and lan belongs to the particle itself; the phonetic nūn in Zaydun is attached after the final case vowel.
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Why Not Every Nūn Is Tanwīn
Tanwīn: Five Types, Their Function, and Omission
Final nūn in min and lan belongs to the particle itself; the phonetic nūn in Zaydun is attached after the final case vowel.