Translate Exit message on Desktop

[thisandagain]

I know this is not the right place to put issues of Scratch Desktop, but...

Expected Behavior

Localization for Exit message of Scratch Desktop

Actual Behavior

It's always in English

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Moved from scratchfoundation/scratch-gui#4320
/cc @apple502j

[thisandagain]

/cc @chrisgarrity @cwillisf

[zhengyongxiong]

Has anyone dist succeeded?

[apple502j]

Feedback from a Japanese Scratcher

https://scratch.mit.edu/discuss/post/3496919/

I pushed X button and something is shown, saying Stay or Leave. I didn't understand so I clicked Leave. My project is gone, and I was about to cry.