To cite package ‘rflashtext’ in publications use:

  Jaimes A (2023). _rflashtext: FlashText Algorithm for Finding and
  Replacing Words_. R package version 1.0.0,
  <https://github.com/abrja/rflashtext>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rflashtext: FlashText Algorithm for Finding and Replacing Words},
    author = {Abraham Jaimes},
    year = {2023},
    note = {R package version 1.0.0},
    url = {https://github.com/abrja/rflashtext},
  }