Thai fonts under the Open Font License

The SIL Open Font License is the most common licence for open fonts, and 35 families in the catalog use it, including every Thai family on Google Fonts. It lets you use the fonts in any project, commercial or not, embed them in documents, apps and websites, share the files, and change them, as long as you do not sell the font files on their own and a changed version stays under the OFL.

Some OFL fonts reserve a name. IBM Plex Sans Thai and its looped sibling reserve “Plex”, and Pattaya reserves “Lobster”. A changed version may not use a reserved name, which is why our previews of the Plex families use the original files while the other OFL families get a reduced web copy. Google Sans is under the OFL too, but listed as a link, because its trademark notice ties the name to the original files.