BQ localisation needs to be named "en_us.lang" for use on case sensitive systems

As silly as it ends up being that it's normally supposed to be `en_US.lang`, with resourceLoader it seems to demand `en_us.lang` otherwise the lang file doesn't get loaded and none of the quests have titles, descriptions, or anything but the raw functionality (which makes it nigh-impossible to get started for any non-windows players)