Is this on the phone menu? You can probably narrow things down by looking specifically at the Text Lists STR# (typically Instances 0x12D or 0x12E) files or the Pie Menu Strings TTAs. You can probably use the filter to sort by PhoneGlobals or anything phone related.
1) Click on the specific file you want, right click, and extract it somewhere to your computer where it will be easy to find.
2) Close the object.packge
3) Click File -> New
4) In the window that lists the individual resources, right click, choose Add..., and add the .xml file that you just extracted.
5) In Plug-in View, hit the Go to arrow until you reach the language you are using.
6) Edit the text however you want it.
7) Click Commit
File -> Save As -> pickAnAppropriateNameForYour.package
Stick your .package file in your Downloads folder (in a subfolder if you wish), and voila, your game should now have the new text that you added.
Incidentally... I searched for 'Invite Household' and you probably want to use the filter to look for:
Group 0x7FE2205A
Instance 0x12D(Dialog prim string set)
in the Text Lists STR# files.
Ste