Added ability to limit the languages to check for

[whnr]

Added a list as language limitation for load_profiles. Also implemented in detect(text, languages=[]) and detect_langs(text, languages=[]). Auto reloading the _factory when the language selection changes.

[Vangelys]

Hello, I also want to limit languages in detection for a project, do you have any news about this functionality and the acceptation of this branch ?

[ManuelMartinG]

I'm also interested in this feature. Is there any expectation to be merged in a new release?

The reason behind my concern is that if you are using langdetect within a PySpark UDF, it's not efficient to load every possible language available. It adds quite an overhead to the serialized size of the UDF passed to Spark. Usually, you're expecting a limited number of languages to appear in your application, no need to have such a big list by default.