SUMO KB machine translation software erroneously changes localized {menu translatedToItalian}, or {button translatedToItalian} back to English e.g. {menu en-USText} #3317

• (reported by @michrogit in Matrix #SUMO)

Describe the bug
When a UI element marked by {menu localizedText} or {button localizedText} is changed in the en-US locale, the English changes overwrite the localized changes e.g. {menu en-USText} or {button en-USText}`

Preconditions

• Change a button or menu UI element in a SUMO KB Article

Steps to reproduce

1. Edit an en-US article
2. Change a UI element e.g. change #Select {menu Toolbars}. to #Click {button Toolbars} located at the bottom-left of the window.`
3. Submit the KB revision.
4. Approve the revision.

Expected behavior
The localized UI element name is used instead of the English one. e.g. in this case the Italian localized #Selezionare {menu Barre degli strumenti}. UI element string is used instead of the English string {button Toolbars}

Actual behavior
The Machine translator changed the localized UI element string back to the en-US UI element string.
e.g. it changed the Italian sentence from
#Selezionare {menu Barre degli strumenti}.
to
#Fare clic su {button Toolbars} situato in basso a sinistra nella finestra.

replacing the entry {menu Barre degli strumenti} with the original en-US interface entry {button Toolbars}.

Screenshots/Screencasts

• screenshot from:
  https://support.mozilla.org/it/kb/Esportare%20i%20segnalibri%20in%20un%20file%20HTML/compare?locale=it&to=348008&from=347814
• en-US article Export Firefox bookmarks etc.
  https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser: [e.g. chrome, safari]
• Version: [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser: [e.g. stock browser, safari]
• Version: [e.g. 22]

Additional context
Add any other context about the problem here.