Child Theme Language File

I’m using a child theme under DT9 and I can’t get it to use the language files in /childtheme/languages/

This is in my child theme functions.php

	function __construct(){ 	
		// INCLUDE LANGUAGE
		load_child_theme_textdomain( "childtheme_ChildishTheme", get_stylesheet_directory() . "/languages" );	

If I load the en_US.mo and en_US.po file into the parent theme language directory it works fine.

I am not creating a whole translation, just changing a few phrases here and there.

Any ideas for me?