Right, and isn't that what Google is doing?
"Hey, if you send a message in the Java language/API, we will understand it and do the same thing that a real java program will do."
"Hey, if you request that a meal be supersized, we'll understand what you intend and execute the Biggie-size operation, which matches what McDonald's would do."
Of course, there is the difference that, unlike Wendy's, Google is (analogous to) telling everyone "you can ask the cashier to supersize your meal" instead of just rolling their eyes and accommodating confused consumers.
>Going to your fast food example, I'm pretty sure that trademark law applies,
As in the sibling subthread, I think the example sidesteps the trademark complication because Wendy's doesn't ever use "supersize" in promotion, they just passively accept user-initiated requests that use the term, and do so in a way compatible with their McDonald's-derived expectations.