langid.py is a standalone Language Identification (LangID) tool. The design principles are as follows: Fast Pre-trained over a large number of languages (currently 97) Not sensitive to domain-specific features (e.g. HTML/XML markup) Single .py file with minimal dependencies Deployable as a web service Remark: the main script langid/langid.py is cross-compatible with both Python2 and Python3, but the accompanying training tools are still Python2-only, hence not installed by this port. See also the port textproc/py-langdetect for a similar program.