She's got this scenario:
one character tells another character that there’s a list of about ten phrases he can say in fifty different languages or dialects of languages. She doesn’t believe him, and challenges him. The sentence she chooses (of the ones on his list) is “Why did you kill your wife?”She needs the last sentence translated into lots of dialects and languages by native speakers. Help her out.
Rosina concludes "Eventually you’ll find out what I’m doing with this." I'm dying -- figuratively, not literally -- to know she's up to here.