Catalan language
Catalan shares many traits with the other neighboring Romance languages (Italian, Sardinian, Occitan, and Spanish). However, despite being mostly situated in the Iberian Peninsula, Catalan has marked differences with the Ibero-Romance group (Spanish and Portuguese) in terms of pronunciation, grammar, and especially vocabulary; showing instead its closest affinity with Occitan and to a lesser extent Gallo-Romance (French, Franco-Provençal, Gallo-Italian).

Q: In pronunciation what is Catalan different from?
Ibero-Romance group