20260923-0 Darkhat 2010-01-01 2025-05-02 true 1950-05-09 DRH 2012-06-27 2011-10-06 Darkhat drh drh Darkhat is in reality a dialect or regional accent variation of Mongolian Halh. When Darkhad speakers converse with Halh speakers from other regions they understand each other fully without difficulty. They consider their language to be Halh. DRH true DRH 1950-05-09 DRH This code is deprecated in ISO 639-3. It is no longer in active use, but still has the meaning assigned to it when it was established in the Standard. 2010-01-18 2010-01-18