Nguyễn Văn Huy (1975) is the only published resource contain data of Quang Lam.
[1] Quang Lam speakers are officially classified as ethnic Khang people.
[3] Nguyen (1975) speculates that Quang Lam may be closely related to Kháng (variously classified as either a Palaungic or Khmuic language), but this has yet to be verified.
Quang Lam speakers claim to not have an autonym, and simply call themselves "Brển Quảng Lâm."
Nguyen (1975:431) lists the following Quang Lam complex consonant onsets in Vietnamese orthography: s'n, p'x, p's, p'k', p'r, th'l, chơr, s'ch, s'i, k'r, k'ch, m'r, l'm, r'v, d'd, r'l.