Clojure has Flare[1] and Cortex[2] for machine learning. Clojure is also a great language for data processing.

Python, of course, gives you access to a host of useful libraries for NLP (SpaCy[3], NLTK, Textacy), machine learning (Scikit-learn, PyTorch, Tensorflow), and more general data processing (Pandas) and visualization (Matplotlib, Seaborn).

[1]: https://github.com/aria42/flare/blob/master/README.md [2]: https://github.com/thinktopic/cortex [3]: https://spacy.io/index