Which of these countries does not use the peso as its currency?

The sol is the currency of Peru; it is subdivided into 100 céntimos ("cents"). The sol replaced the Peruvian inti in 1991 and the name is a return to that of Peru's historic currency, as the previous incarnation of sol was in use from 1863 to 1985. Although sol in this usage is derived from the Latin 'solidus' (English: solid), the word also means "sun" in Spanish. There is thus a continuity with the old Peruvian inti, which was named after Inti, the Sun God of the Incas.

The peso is the currency of Argentina, Chile, Colombia, Cuba, Dominican Republic, Mexico, Philippines and Uruguay.