The origin trials developer console doesn't allow setting up more than one domain for a given origin trial, unless they're subdomains of each other. As a result, our mobile sites require a separate token. I've requested that they add the ability to register a list of domains.

Adding the ability to serve different tokens to the desktop and mobile site for the same wiki would require changes to Mediawiki. Since Spanish Wikipedia also has the performance perception survey, I'm going to be lazy and register the same trials for the Spanish Wikipedia mobile site. We'll have the reverse effect of the ongoing trials, whereby the same token will be served to both mobile and desktop, but the origin trials will only work on the mobile site.