French phrase
Dans quelle langue doit être ~ ?
Meaning
What language should ___ be written in?
When to use it
Asks which language something should be written in. Used for documents, applications, and emails when the language depends on the recipient.
Example dialogue
Dans quelle langue doit être rédigé ce dossier ?
What language should this document be written in?
Il faut le rédiger en anglais.
It needs to be written in English.