BL Coding Text not load in game

[Hercule]

I’m making a mod which will add some new menus in the game. I try to find away to keep the ability of localization.
So I use the syntax

{=stringid}sometext

to put all text for menu and menu option. I also done the .xml file for all stringid. But this dosen’t work. In game I can only see the default text.
Should I do something else to make it works?