The most I could find is the .AutoLocalize property of the ProximityPrompt, that excludes itself from being automatically translated. I don’t think Roblox supports excluding only the ObjectText or ActionText being excluded from Localization.
Hey, I’m so sorry for this late reply! I got really confused and started to just experiment with LocalisationService, and I believe to have found a quick fix to your situation. I’ll still be going over what the guide had to say.
Not necessarily your solution, but still good to know:
Basically, the Doc you attached is for translating certain parts of a string.
To exclude a string from being automatically translated, all you had to do was to place curly prackets {} around a string and use Translator:FormatByKey() to manually translate the strings that were wrapped in the curly brackets.
This whole complicated process had to be done by:
Downloading a spreadsheet and adding the Key value to a certain translation so you could reference it using Translator:FormatByKey(),
and THEN using Scripts to manually detect the parameters in the string and replace them with the actual translations.