There is a phenomenon in Spanish called yeísmo (which contrasts with lleísmo). In the former, the phoneme /ʎ/, a palatal lateral approximant phoneme (similar to Italian <gl>, represented by the grapheme <ll>, is pronounced a a simple i griega <y> (link). It is an important distinction between different regional varieties of Spanish. In Argentine (or Buenos Aires) Spanish, it is realized voiced post-alveolar fricative /ʒ/, though this is changing to a voiceless version /ʃ/. In other dialects it is voiced or voiceless affricates. In Catalan, it is mostly a /ʎ/.

Ceci n'est pas un seing.