This is East Africa, which has 10 countries. But out of these 10 countries, only Kenya, Tanzania and South Sudan which doesn't have their natural native national languages. Burundi they use kirundi, Rwanda they use kinyarwanda. Both are same. Uganda they speak Luganda as their national language. And sometimes they use English but English is not priority there. Ethiopia they speak Amharic and they use it everywhere as their national language rejecting other foreign languages. Somalia they use Somali and Arabic. But Somali is their native language from Somalia origin and its widely spoken all over Somalia as their national language. TANZANIA and KENYA and SOUTH SUDAN they don't have their native languages. Tanzania and Kenya mostly they speak swahili as their national language. But they use English as an official language. Swahili is not originally East African language. Its a mixture of different languages. Only 40% of words of East Africa bantus languages are in swahili. Others were stolen from Arabic, Hindi, Portuguese and English. They call bank- BENKI or BANKI, stand- STENDI, Battery- BETRI, solar- SOLA, bag - BEGI, bus - BASI, lorry - LORI, camera- KAMERA, machine- MASHINE. They change pronunciation when they steal words from English and other languages. South Sudan they speak English and Arabic are not their native languages. Arabic is from middle East and English is from Britain. So only Burundi 🇧🇮, Rwanda 🇷🇼, Uganda 🇺🇬, Ethiopia 🇪🇹 and Somalia 🇸🇴 has embraced their native languages until today. Tanzania 🇹🇿 and Kenya 🇰🇪 they stolen words from foreign languages they mixed with their to make swahili. And they embraced English as their official language which is from colonialists.