Improvement to Chinese words separator's Parallel Text highlighting for Safari

Translated words that are split apart are now all highlighted

More details: https://www.anicehumble.com/2023/01/browsers-translation-mechanism.html

https://juejin.cn/post/7025868886914400293

Here's another example: https://czbooks.net/n/c8dbnf/cllgb6e?chapterNumber=2

More advanced example:

More example:

https://www.zhihu.com/question/19562698