Learn to use good grammar, whether doing a report or not, or go to school.
You also need some education in history, Swahili is derived from Arabic word sawahil which means "coast". Swahili or Kiswahili was born as a blend of the Bantu grammar and the Arab vocabulary, and was initially written with Arab characters. It has become a cosmopolitan language, infusing many loan words from a variety of languages, Portuguese, English, German, Farsi (Persian) and Indian words have all found their way into Swahili. So there is no particular community that can claim its ownership, just very funny that even people from mainland both Tanzanians and Kenyans claims to own Swahili. In Tanzania, anybody heard speaking own indigenous language is viewed as unpatriotic, you have so many tribes but are only known by names but not heard. No wonder you still don't seem to achieve much in tourism despite having everything at hand.