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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_multilingual_project(site_id=None):
 """ Whether the current Django project is configured for multilingual support. """

    from parler import appsettings
    if site_id is None:
        site_id = getattr(settings, 'SITE_ID', None)
    return appsettings.PARLER_SHOW_EXCLUDED_LANGUAGE_TABS or site_id in appsettings.PARLER_LANGUAGES