When I first encountered this question, it seemed like the ordinary struggles of a non-English speaker learning the language, so I flagged it to be migrated to ELL.
As the original poster's comments rolled in, it became clear that wasn't the case: they neglected to put an important condition into the question, a condition that substantially changed what they were asking.
I wanted to change my flag from "migrate to ELL" to "too broad". Both are sub-flags of "should be closed". It wasn't possible to click on "Should be closed" to get to its sub-flags; that option was was disabled. I retracted the flag, but found that once you'd done that you couldn't re-flag with that reason (some of the other flags were still available).
Is there a way to change the sub-category of a flag? If you can't currently do that, would it be possible to add that functionality?