current language shortcode

Hi. I need to add the language variable into a link. Probably the best way would be with a shortcode.

What I need to achieve is to display a widget in the selected language. Part of the widget code is:
<script id=”travelmyth-info” src=”https://www.travelmyth.com/hotel-information.js?hid=xxxx&l=en&c=h&w=400&h=400″&gt;

and I was thinking about something like
<script id=”travelmyth-info” src=”https://www.travelmyth.com/hotel-information.js?hid=15685&l=%5Bcurrent-language%5D&c=h&w=400&h=400″&gt;

is it possible?
I would check here, but the link is not working: https://trac.transposh.org/wiki/ShortCodes

Thanks!

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