I have a question. I download FontAwesome (SIL OFL licence 1.1). I took icon- bulb and expand it to curves in vector software. I edit that icon that the icon never look like original anymore. And I add part of another icon to that bulb. Can I use it for comemrcial logo for my client? I just used that original icon and change it a lot, just because I need taht shape of bulb.
This is a related but distinct question. Under SIL's license, you cannot use their font names in a derived product (make up your own name), and you cannot sell their fonts alone (you can sell a product that includes the font); any derivative has to be made available under the same license.
Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software
Creating a graphic object based on their font and using it for commercial purposes is covered by their permissions.