Mmm. Then that's not how you should do it.
If you want to only display some price to a group and some other price to another group, you should create several prices in your product and attribute the prices to the corresponding groups. Or assign the discount only to the user group of the dealers.
For that, you'll need to ACL support which is in the Business edition of HikaShop.
Also, you won't be able to display the Dealers text with just a translation override in that case because the text would even display for non dealers. In that case, you will have to edit the file "listing_price" of the view "product" via the menu Display>Views and add something like that at the top:
<?php
if(count($this->row->prices)>1 || !empty($this->row->prices[0]->discount)){
echo 'Dealers ';
} ?>