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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 install_translations(config):
 """Add check translations according to ``config`` as a fallback to existing translations"""


    if not config:
        return

    from . import _translation
    checks_translation = gettext.translation(domain=config["domain"],
                                             localedir=internal.check_dir / config["localedir"],
                                             fallback=True)
    _translation.add_fallback(checks_translation)