gistfile1.py

from Products.Five.browser import BrowserView

class LangRedir(BrowserView):
    """language redirect"""
    
    def __call__(self):
        target = 'en-ie'
        for lang in self.context.portal_languages.getRequestLanguages():
            if lang in ('de-at', 'de-ch'):
                target = 'de-at'
                break
            if lang == 'de-de' or lang.startswith('de'):
                target = 'de-de'
                break
            if lang.startswith('es'):
                target = 'es-es'
                break
            if lang.startswith('it'):
                target = 'it-it'
                break
            if lang.startswith('pl'):
                target = 'pl'
                break
            if lang.startswith('en'):
                target = 'en-ie'
                break                
        url = self.context.portal_url() + '/' + target
        return self.request.response.redirect(url)