Add check translations according to ``config`` as a fallback to existing translations

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)