Today's language of the day comes from the Bantu group spoken in, roughly speaking, the southern half of Africa (if you imagine a line from the Nigerian coast to the Somalia/Kenya border, think below that line and you'll get the picture), and thus called because many of its languages use a stem similar to -ntu or -tu for “person” or “man” and ba- as a plural marker (hence bantu, meaning “people” or “men”). It's name is Kinyarwanda, virtually meaning “language of Rwanda”, and it is spoken by 7 million in Rwanda – virtually all of its population. A very similar and mutually intelligible language, Kirundi, is spoken in neighbouring Burundi by 4.6 million people. Rwanda is very close to the Equator but high enough in the hills to be known as 'the Land of the Thousand Hills', or in Kinyarwanda, Igihugu cy'imisozi igihumbi.
Kinyarwanda is a typical Bantu language, using prefixes, infixes and suffixes to change words in order to fit the context, so igitabo which means “book” becomes ibitabo to mean “books”.Umuntu muto, “little man”, turns intu abantu bato to mean “little men” (notice the 'bantu' bit). If -bon- is the stem to mean “to see”, then tuzabona means “we shall see” (made by tu-, indicating the “we”, -za- indicating the future, -bon- indicating the stem, as well as the suffix -a). Twabonye means “we saw”, while twabonaga is “we have seen”. Learning Kiynarwanda obviously takes a lot of learning when to use what prefix, infix or suffix.
Muraho is what you would say to greet people, although you can say Waramutse (in the morning) or Wiriwe (any other time of the day) to people you know. Murakoze is “thank you” - although it literally means “you have worked”. If you ever go to Rwanda to see the mountain gorillas, do know that a gorilla is called ingagi in Kinyarwanda.
[PS Edit: I asked native speaker and friend Shivon to look at the post and she spotted a typo, as well as the fact that I had confused my past simples with my present perfects. The bottomline of this: always ask a native speaker! Shivon, murakoze! Tuzabonana mu Rwanda cyangwa mu Glasgow]