Line breaking when Chinese and Western texts are mixed

https://www.w3.org/International/articles/typography/linebreak#sec_ja_vai

The article mentions that in some cases, the character-based line-breaking feature of Chinese/Japanese also applies to embedded Western text. The embedded text is wrapped without regard to syllable or hyphen boundaries. Similarly, Japanese and Chinese text embedded in Western text may be treated as a single unit when wrapped. Is this common? Do we need to mention it in clreq?

文章中提到，在某些情况下，中文和日文的基于字的换行方式也适用于嵌入的西文。被嵌入的文本被换行时，不考虑音节或连字符边界。同样，嵌入在西文中的日文和中文文本可能在换行时被视为一个单元。这种情况是否常见？我们是否需要在文中提一下这一点？

Start with the W3C International article section linked in the issue and compare its mixed Chinese, Japanese, and Western text line-breaking behavior with the relevant clreq content. Determine whether the behavior is common and whether clreq needs an explicit note; completion requires a documented conclusion or proposed documentation change.