J2mepolish自动增加了两个Command，怎样中文化呢？

When I append a TextField into a Form ,I found j2mepolish automatic add two Command 'delete' and 'clear'.
So I look at the source of j2mepolish's 'TextFiele',I found this:

if (!this.isUneditable) ...{
//#ifdef polish.i18n.useDynamicTranslations
String delLabel = Locale.get("polish.command.delete");
if ( delLabel != DELETE_CMD.getLabel()) ...{
DELETE_CMD = new Command( delLabel, Command.CANCEL, 1 );
}
//#endif
this.addCommand(DELETE_CMD);
}
//#endif
//#if polish.TextField.suppressClearCommand != true
removeCommand( CLEAR_CMD );
if (!this.isUneditable) ...{
//#ifdef polish.i18n.useDynamicTranslations
String clearLabel = Locale.get("polish.command.clear");
if ( clearLabel != CLEAR_CMD.getLabel()) ...{
CLEAR_CMD = new Command( clearLabel, Command.ITEM, 2 );
}
//#endif
this.addCommand(CLEAR_CMD);
}

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I want to translate the value 'polish.command.delete' into Chinese,but I can't find the 'message.txt' file
How could I do this?
How could I compile the whole source code?