The limits of my language mean the limits of my world. (Die Grenzen meiner Sprache bedeuten die Grenzen meiner Welt.)
Tswana is a language of Botswana. Roughly 78% of the population there speak it as a first language.
Tswana (or Setswana) is spoken by roughly 5 million people. The largest concentration of speakers is over an area that covers northern South Africa and southern Botswana (where it is the national language, and spoken by most of the population). There are much smaller numbers of speakers in Zimbabwe and Namibia, and also a small number in the UK.