In much of the Spanish-speaking Americas, and in many regions of Spain, ⟨ll⟩ is produced /ʝ/ (voiced palatal fricative); in Colombia and Tabasco, Mexico, as well as Rioplatense speakers in both Argentina and Uruguay, pronounce ll as /ʒ/ (voiced postalveolar fricative) or /ʃ/ (voiceless postalveolar fricative).
Encyclopedia of South America from A to Z