readme-rfn-addendum.md

Some fonts have parts of their name "reserved" per the [Reserved Font Name mechanism][SIL-RFN]:

No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users.

• The main goals seem to be to: Avoid collisions, Protect authors, Minimize support, and Encourage derivatives

See the [Reserved Font Name section][SIL-RFN] for additional information