This is a note on all descriptions, not just the staff property sheet.
When writing in Python, almost all items are used as they are, as variables in Python.

Characters that cannot be used in Python are skipped, and a prefix is added.
This avoids Python compilation errors while preserving the original name as much as possible.

In summary, it is better not to use a character set that cannot be used in Python as much as possible from the beginning so that the original name can be guessed.
Of course, if you do not plan to use Python, you can ignore it!