This question already has an answer here:
Is it ever acceptable to edit and Anglicise the contents of a question on Stack Overflow?
By way of an example, this question in which the user gives the following HTML markup:
<div class="box-a bfc">drei</div> <div class="box-b bfc">vier</div>
And in the questions asks:
The box "drei" and "vier" have collapsing margins
This is perhaps only the most basic example (for which Anglicisation would likely not offer much value), but for the sake of argument it would involve replacing
I would posit the majority (answering/viewing) audience of Stack Overflow is English, so changing question content to English may be of more immediate help for answerers and future viewers, but clearly of less help to the OP.
My personal view would be to take it on a case by case basis, perhaps preferring to leaving language 'as the OP intended', but it would intrigue me to know what the general feeling on this subject was.