On Surfer there are two types of NLP - one directly based on Google API and one made by us!
Google NLP:
As the NLP features run in connection with Google's NLP API, we are only able to support the languages that the API supports.
English
French
German
Italian
Japanese
Korean
Portuguese
Russian
Spanish
Simplified Chinese
Traditional Chinese
For more information visit the Google Support site.
Surfer NLP:
Right now, the Surfer NLP is available in 4 languages, but we’ll gradually add the most frequently requested languages.
English
Danish
Dutch
Polish