The docs referenced the wrong namespace for the Language class. It said ``PhpOffice\PhpWord\ComplexType\Language``, but there's no Language class in the namespace ``PhpOffice\PhpWord\ComplexType``. I searched in the tests to figure out where the Language class has moved to and found in ``PhpOffice\PhpWord\Writer\Word2007\Part\SettingsTest::testLanguage()`` this had to be ``PhpOffice\PhpWord\Style\Language``.
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