Do I need to enable the unicode feature to use CJK characters?

[mamekoro]

unicode: Turns on support for unicode characters (including emoji) in arguments and help messages.
― https://docs.rs/clap/4.5.4/clap/_features/index.html

The doc is ambiguous to me. Does the word "unicode characters" mean "non-ASCII characters"? If so, am I correct that I need the unicode feature to use CJK characters?

My app uses CJK characters in its long_about text without the unicode feature, but it seems to work fine, so I don't know what unicode actually does.

[epage]

Currently, the functionality you gain when activating this feature includes

• awareness of how to count multi-byte characters for textwrapping purposes
• how to do case-insensitive matching where enabled

For most other functionality, clap is agnostic to the exact set of characters that are used.