Message on registration form in different languages

Hi,

I would like to add a message to the registration form in the context of:

<<
Registration for retailers only
If you are a retailer interested to become ... blablabla....
>>

I currently did this by changing the registration.php
This works fine when you use one language.

Since I'm working on a multi-lingual site, I would like to understand how do add a text , which I would be different depending on the selected language.

In the registration.php file (or in any PHP file of your website), instead of directly writting your text, you can do:
<?php echo JText::_('TRANSLATION_KEY'); ?>

and then in each language override file of your website, you can add such line:
TRANSLATION_KEY="My text"

That's not really a HikaShop thing. That's purely Joomla's way of translating static text.
Some explanation provided by Joomla for templates as reference:
docs.joomla.org/Making_templates_translatable

Thanks Nicolas. Very helpfull