README.txt

From the Noto Sans Khmer UI download.

Noto Sans Khmer UI
==================

Designer: Google
License: SIL Open Font License 1.1 (see OFL.txt)
Styles: 1
Source: https://fonts.google.com/specimen/Noto+Sans+Khmer+UI

Noto is a global font collection for writing in all modern and ancient
 languages. Noto Sans Khmer UI is an unmodulated (“sans serif”) design for
app
 and website user interfaces in the Southeast Asian Khmer script. It
 has multiple weights and widths, and 381 glyphs.

This font is free to use, share and modify under its license.
Downloaded from FontCart: https://www.fontcart.com