Italian cuisine often features olive oil and balsamic vinegar, which enhance salads and pasta dishes. Pesto, made from basil, pine nuts, and Parmesan, is another staple for pasta. 
In Mexican cuisine, salsa, guacamole, and sour cream are essential. Salsa adds spice, guacamole provides creaminess, and sour cream balances flavors in tacos and burritos.
Japanese dishes frequently use soy sauce, wasabi, and pickled ginger. Soy sauce adds umami, wasabi offers heat, and pickled ginger cleanses the palate, especially with sushi.
Indian cuisine relies on chutneys and raita. Mint or tamarind chutneys add tanginess, while raita, a yogurt-based condiment, cools down spicy dishes.
For Middle Eastern cuisine, tahini and harissa are popular. Tahini, a sesame seed paste, is used in hummus and dressings, while harissa, a chili paste, adds heat to meats and stews.
In Thai cuisine, fish sauce and sweet chili sauce are key. Fish sauce provides a salty depth, and sweet chili sauce offers a balance of sweet and spicy flavors.
French cuisine often uses Dijon mustard and aioli. Dijon mustard adds sharpness to sandwiches and dressings, while aioli, a garlic mayonnaise, complements seafood.
Chinese dishes frequently incorporate hoisin sauce and black bean sauce. Hoisin sauce is sweet and tangy, perfect for stir-fries, while black bean sauce adds a savory depth to meats.
For American cuisine, ketchup, mustard, and barbecue sauce are classics. Ketchup is versatile, mustard adds tang, and barbecue sauce provides a smoky sweetness to grilled meats.
In Korean cuisine, gochujang and kimchi are staples. Gochujang, a fermented chili paste, adds heat and depth, while kimchi, fermented vegetables, offers a spicy, tangy crunch.