The phrase "curso de ingles online gratis" is in Spanish and can be translated into English as "free online English course." This phrase is used on websites offering free English as a Second Language classes to Spanish speakers, such as the website for the free language application, Duolingo.
The phrase "curso de ingles online gratis" can be translated word for word. The noun "curso" means "course" and refers to a class. The word "de" is used before the adjective "ingles" and means "of." "Ingles" means "English," while "gratis" means "free."
Free English courses can be useful to anyone who is interested in learning or reviewing English, but does not have the funds to take classes at a language school.