Can I use _locale/en/messages.json string in script file?

Can I use string entered in _locale / en / messages.json in the popup.js script file?

browser.i18n.getMessage(
  messageName,  // string
  substitutions // optional any
)

https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/i18n/getMessage

Can I use _locale/en/messages.json string in script file?
 
 
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