Public Sans violates the SIL 1.1 license

[tssva]

Text recently added to the Readme and license clearly identifies this as modified work of a SIL 1.1 licensed work and depending on your location either public domain or CC0 licensed code. The SIL 1.1 license does not allow distribution of a modified work unless the entire work is licensed under the SIL 1.1 license.

[x448]

Here's the relevant text in SIL 1.1 license which covers the Libre Franklin font:

5. The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software.

@thisisdano this could be cleared up by a statement from the Libre Franklin font author @impallari granting an exception and allowing the Public Sans license. After all, the Public Sans license mentions and protects Libre Franklin which serves as a nice advertisement.

It might also be good for uswds team to also contact sil.org to come up with a US Govt. works compatible SIL 1.2 license that includes an appropriate exception for future fonts.

You may also want to contact NIST to see if they want to define standard font metrics for sans, monospace, and serif. Maybe NIST can have font competitions like they already do with crypto algorithms. These fonts can be used for govt. forms that work on all operating systems.

BTW, I love Public Sans. Great work!