Part of the North of Africa, most of South America, all of Central America and half of North America (which includes today's Mexico and the part of the USA of states: California, Nevada, Colorado, Florida, New Mexico, Texas; which explains why those states have names in Spanish, anyway). Also, the Philippines. Even to this day, twenty seven countries speak Spanish as their first language, which is a legacy of those days of conquest and colonization. It is not surprising that the two languages with the largest number of native speakers (that is, people who use the language as its native one) are Mandarin and Spanish (second). The number of English speakers surpasses this, but only if we include the ESL who are the majority.