Noto Sans Tai Viet
Google Fonts · 2012

A plain, single-weight sans-serif offering Unicode coverage for the Tai Viet script of mainland Southeast Asia.
About
Noto Sans Tai Viet supports the Tai Viet script, which encodes the languages of several Tai-speaking communities in Vietnam and Laos, alongside a standard Latin character set. Its single weight limits its typographic flexibility considerably, making it a tool for accessibility and preservation rather than expressive design. It is most useful in digital applications, government documents, and cultural resources targeting Tai Dam and related communities.
Classification
A single-weight sans-serif supporting the Tai Viet script used by the Tai Dam, Tai Dón, and related communities across Vietnam and Laos, paired with Latin characters. The design is neutral and functional in keeping with the broader Noto system.