Part of the point is that if you read the Rust foundation's recent document strictly enough, anyone else aren't actually allowed to say the name Rust, since they didn't get explicit permission and/or aren't willing to comply with all of the terms.
So they don't dare say the name to avoid any chance of being sued.
Not that it's actually likely, but the point is that the document is that bad, so IF you take it at it's word, then well that's how it evaluates out, is the only way to be safe is just don't use the actual logo or name at all. Anything else you do technically runs afoul of at least one of the many terms and conditions in there.
You can always use the word Rust to refer to the actual Rust language or the Rust project. In a similar fashion the Python Software Foundation will sue you for trademark infringement if you create a general-purpose programming language distinct from Python and call it Python.
So they don't dare say the name to avoid any chance of being sued.
Not that it's actually likely, but the point is that the document is that bad, so IF you take it at it's word, then well that's how it evaluates out, is the only way to be safe is just don't use the actual logo or name at all. Anything else you do technically runs afoul of at least one of the many terms and conditions in there.