def is_primary_language(language=None):
    """
    Returns true if current or passed language is the primary language for this
    site.  (The primary language is defined as the first language in
    settings.LANGUAGES.)
    """

    if not language:
        language = translation.get_language()

    return language == settings.LANGUAGES[0][0]

    Returns true if current or passed language is the primary language for this
    site.  (The primary language is defined as the first language in
    settings.LANGUAGES.)
    
feincms/translations.py