The limits of my language mean the limits of my world. (Die Grenzen meiner Sprache bedeuten die Grenzen meiner Welt.)
Rwanda is a language of Rwanda. Roughly 78% of the population there speak it as a first language.
The Rwanda language (or Kinyarwanda) is spoken by between 7 and 9 million people. Most of those people are in Rwanda (where it is an official language), and there are speakers in southern Uganda, and eastern Democratic Republic of the Congo. Rwanda is closely related to Kirundi, and they are largely mutually intelligible.