如果您需要检测语言以响应用户操作，则可以使用google ajax语言API：
#!/usr/bin/env python
import json
import urllib, urllib2
def detect_language(text,
userip=None,
referrer="http://stackoverflow.com/q/4545977/4279",
api_key=None):
query = {'q': text.encode('utf-8') if isinstance(text, unicode) else text}
if userip: query.update(userip=userip)
if api_key: query.update(key=api_key)
url = 'https://ajax.googleapis.com/ajax/services/language/detect?v=1.0&%s'%(
urllib.urlencode(query))
request = urllib2.Request(url, None, headers=dict(Referer=referrer))
d = json.load(urllib2.urlopen(request))
if d['responseStatus'] != 200 or u'error' in d['responseData']:
raise IOError(d)
return d['responseData']['language']
print detect_language("Python - can I detect unicode string language code?")
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