PHP error message

I don't know enough about PHP to know if this error is important, if it is I'd like some advice on how to get rid of it.

In HS > Categories, if I open one (and only one) of my categories with sytem error reporting set to maximun, I get these error messages:

Notice: Undefined offset: 7 in [site path]/administrator/components/com_hikashop/helpers/translation.php on line 62

Notice: Trying to get property of non-object in [site path]/administrator/components/com_hikashop/helpers/translation.php on line 62


I went to the offending file and copied a few lines of code. Here are lines 56-63:

}
	function getFlag($id=0){
		$this->loadLanguages();
		if(isset($this->languages[$id])){
			return '<span style="background: url('.$this->flagPath.$this->languages[$id]->shortcode.'.gif) no-repeat;padding-left:20px">'.$this->languages[$id]->code.'</span>';
		}
		return $this->languages[$id]->code;
	}

Got it.

This was because I translated one category name into French but no more. I've now deactivated French as a language for our initial launch, and voilà. The message disappeared when I reactivated French but now I know I can safely ignore it, thanks!