Final answer:
Nicaragua is the country with the Mosquito Coast on its Caribbean side and the Gulfs of Honduras and Fonseca along its coasts. It is the largest country in Central America with a diverse multiethnic population.
Step-by-step explanation:
The country with the most eastern part of the Caribbean coast being the Mosquito Coast, present more in Nicaragua, and having both the Gulf of Honduras and the Gulf of Fonseca is Nicaragua. Nicaragua is the largest country in Central America, with a population of approximately 6 million people that is multiethnic, including indigenous native tribes from the Mosquito Coast, as well as people of European, African, Asian, and Middle Eastern origin.
The main language is Spanish, with native tribes on the eastern coast speaking their native languages, including Miskito, Sumo, Rama, and English Creole. The diverse mixture of cultural traditions in Nicaragua has generated substantial diversity in art, cuisine, literature, and music.
Nicaragua is bordered by Honduras to the north and Costa Rica to the south, with the Caribbean Sea to its east and the Pacific Ocean to its west.