Drag-yab is a Sino-Tibetan language recently documented by Suzuki & Nyima (2018, 2019).
[1][2] It is spoken in the southern half of Zhag'yab County, Chamdo, eastern Tibet.
Suzuki & Nyima (2018) document the dialect of Drag-yab spoken in the village of Razi 热孜村 in Xiangdui Town 香堆镇, Zhag'yab County.
[2] Jiang (2022) lists Mang 芒话 and Maji 玛吉话 as Drag-yab (Chaya 察雅) varieties.
[4] Suzuki & Nyima (2018)[1] note that Drag-yab is closely related to two other recently documented Sino-Tibetan languages of Chamdo, eastern Tibet, namely Lamo and Larong.