how can I make the text on the worldmap larger?

In BG:EE (Android), how can I make the text on the worldmap larger? I try to create a Lua file in the "override" directory and write in it:
But it failed and was unrecognizable.
Styles ['worldmap'] ['font']='POSTANTI' Styles ['worldmap'] ['point'] = 12
But it failed and was unrecognizable.
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