The Classical Language Toolkit (CLTK) is a Python library offering natural language processing (NLP) for pre-modern languages.

For the CLTK's latest version:

$ pip install cltk

For more information, see Installation docs or, to install from source, Development.

Pre-1.0 software remains available on the branch v0.1.x and docs at https://legacy.cltk.org.

Documentation at https://docs.cltk.org.

@Misc{johnsonetal2014,
 author = {Johnson, Kyle P. and Patrick Burns and John Stewart and Todd Cook and Clément Besnier and William J. B. Mattingly},
 title = {CLTK: The Classical Language Toolkit},
 url = {https://github.com/cltk/cltk},
 year = {2014--2021},
}

Copyright (c) 2014-2026 Kyle P. Johnson under the MIT License.