Localized name for default sounds in /System/Library/Sounds

In the Mail settings one can choose one of the default sounds located at /System/Library/Sounds. Playing them is easy, e.g. with NSSound(named: "Purr")?.play(), but how can I show a localized name for those sounds as Mail does? I couldn't find any way of getting a localized name. Would I have to manually translate each one to each supported language?

Localized name for default sounds in /System/Library/Sounds
 
 
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