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Additional notes about the "CoCalc Icon Font"

R Logo

It is derived from the SVG file obtained from: https://www.r-project.org/logo/. According to the mentioned terms of CC-BY-SA 4.0, it is fine to use it in a derived form as a glyph in that font.

Python Logo

The Python logo is used as an icon for *.py files and when mentioning the Python programming language. According to https://www.python.org/psf/trademarks/

Use of freely distributable derived logos as icons for files and executables -- Allowed if used to refer to the Python programming language.

this is fine.