def __init__(self, request=None):
        raise NotImplementedError
Return whether to use the fallback language.
dataset/ETHPy150Open uwdata/termite-visualizations/web2py/gluon/cache.py/CacheAbstract.__init__--crossover with--dataset/ETHPy150Open edoburu/django-fluent-contents/fluent_contents/templatetags/fluent_contents_tags.py/PagePlaceholderNode.get_fallback_language