Possible Clues:

• 'Sure thing' for Speedy Gonzales
• Asunción assent
• Señor's "Positively!"
• 'Say ___' (1940 hit)
• "Yes, yes!" in Cancun
• Emphatic agreement, south of the border
• Oaxaca "Of course!"
• Hoped-for reply in 'Spanish Eyes'
• 'You bet!,' south of the border
• Enthusiastic Andalusian assent