Logical OR on two passed parameters

I am bringing in two passed parameters from the URL. If either of them does not exist, I want to display some content. The following checks brandID only, I want to check lang also in the same if statement (logical OR) so I don’t have to have the same content twice on the page.

[raw]
[pass global="_GET" fields="brandID,lang"]

[if not pass="{BRANDID}"]
<p>Brandid is empty, display default content</p>
[/if]

[/pass]
[/raw]

I do really like this plugin so far, your suggestions very much appreciated.

https://wordpress.org/plugins/custom-content-shortcode/