Swahili-speaking countries. Countries where Swahili is spoken are listed here. List of countries, nations and states with an official language of Swahili can be viewed. List of Swahili-speaking nations, including republics with multiple official languages, is alphabetized and sortable by column.How many countries speak Swahili? That's a question you probably may not know the answer to so this list will hopefully give you the most accurate number of countries where Swahili is the official language. You may not be familiar with some of the places or surprised by what nations use Swahili, but this should provide the perfect answer.