CJK text often mixes multiple scripts like Han, Arabic numbers, and Latin characters. For better readability, inter-script spacing is automatically added by programs like Microsoft Word and XeLaTeX (with the help of xeCJK). But this is not true for Web browsers. Projects like pangu are created to add spaces automatically, but the effect is not optimal.

Luckily, CSS Text Module Level 4 introduces the text-autospace property just for this purpose, and it has been supported by Chrome with the Experimental Web Platform features flag. It'll be a great boon to many users if Prince also supports this feature.

Edited 10 May 2024 by yyang

I will add a note to the roadmap to keep an eye on this property.

Thanks!