Improve spellchecking in combination regex show rules

[Yourouchour]

Description

I am writing a bilingual Chinese-English document and encountered a problem.

If I set the spell check to Chinese, then it cannot check English words, as shown below.

#set text(lang:"ch")

asdfasdfasdf

However, if I set the language to English, then all Chinese characters will be considered spelling errors.

#set text(lang:"en")

这是一段没有问题的文字。

This is a piece of text without *ANY* problems.

I would appreciate it if it can be implemented in the near future!

Use Case

As mentioned above, this improvement will benefit those who need to write in multiple languages simultaneously.

[frozolotl]

For what it's worth, you can set the language in specific sections to english:

#set text(lang: "zh")
#let en(content) = text(lang: "en", content)

这是一段没有问题的文字。

#en[This is texxxt with problems.]

#text(lang: "en")[Of course, you don't _need_ to define a function for this. But it is a bit more to type.]

[Yourouchour]

For a document mixed with Chinese and English, adding a function to all the English parts is tedious and annoying.

Fortunately, because Chinese is very different from English, I can write like this.

#set text(lang:"en")
#show regex("[一-龥]"): set text(lang: "ch")

What I want to say is that writing it this way will not have any effect, including writing it like this.

#set text(lang:"en")
#show regex("[一-龥]"): it => text(lang: "ch")[#it]

[laurmaedje]

This not working is specific to text show rules which due to how they are handled in the compiler currently lose the source location information.