Castilian, usually known as Spanish, which is spoken in all the national territory, Equatorial Guinea, the Sahara, Central and South America ,except Brazil and the Guyanas, and parts of the United States and the Philippines, is the fourth language in the world in terms of numbers of speakers ,over 330 million.

Spanish Speaking Countries and Population

                 COUNTRY          SPANISH SPEAKING POPULATION
                 1. SPAIN                          39,500,000
                 2. U.S.A                          22,500,000
                 3. GUINEA ECUATORIAL                 300,000
                 4. FILIPINAS                       2,900,000
                 5. GUATEMALA                       9,200,000
                 6. EL SALVADOR                     5,200,000
                 7. HONDURAS                        4,500,000
                 8. NICARAGUA                       3,100,000
                 9. COSTA RICA                      3,100,000
                10. ECUADOR                        10,000,000
                11. PERU                           22,000,000
                12. MEXICO                         80,000,000
                13. CUBA                           10,800,000
                14. REPUBLICA DOMINICANA            7,300,000
                15. PUERTO RICO                     3,500,000
                16. PANAMA                          2,100,000
                17. VENEZUELA                      18,000,000
                18. COLOMBIA                       33,600,000
                19. BOLIVIA                         6,900,000
                20. PARAGUAY                        4,500,000
                21. ARGENTINA                      32.500,000
                22. CHILE                          13,600,000
                23. URUGUAY                         3,150,000