Rust should have a permission from the Rust team it can still be called Rust
Rust requires any modified copy to be explicitly approved by them that it can still be called Rust.
If you write an email to them, they will probably say it is okay, like they did with Void.
https://github.com/void-linux/void-packages/issues/18008
Part of Rust's media guide about this:
https://www.rust-lang.org/policies/media-guide#uses-that-require-explicit-approval