To cite package ‘toponym’ in publications use:

  Chevallier L, Wichmann S (2025). _toponym: A Toponym Analysis &
  Visualization Tool_. <https://github.com/Lennart05/toponym>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {toponym: A Toponym Analysis & Visualization Tool},
    author = {Lennart Chevallier and Søren Wichmann},
    year = {2025},
    url = {https://github.com/Lennart05/toponym},
  }