Determine if text is in English?

Question

I am using both Nltk and Scikit Learn to do some text processing. However, within my list of documents I have some documents that are not in English. For example, the follow

Answer 1

There is a library called langdetect. It is ported from Google's language-detection available here:

https://pypi.python.org/pypi/langdetect

It supports 55 languages out of the box.