Kermanshah sits at the cultural crossroads of Persian and Kurdish Iran, so you'll hear both Farsi and Southern Kurdish (with some Sorani touches) on the streets, in the Grand Bazaar, and at sites like Taq-e Bostan. Persian is the official written and working language and is understood almost everywhere, while Kurdish dominates casual conversation and is essential for warmth in smaller shops, teahouses, and rural villages around the Zagros foothills.
Outside larger hotels and tourist offices, English proficiency is limited and signage uses Persian script read right-to-left. Phrase cards and a few written Farsi words are therefore more useful here than in many Iranian cities. Because Islamic customs shape daily interactions, polite forms and etiquette phrases matter as much as transactional ones — the cards below are grouped by real travel moments so you sound natural and respectful in Kermanshah.