So as I am already an honorary Breton, I rarely ask French people to speak English with me, and generally I think they appreciate my effort despite being only a few months into this whole French-language-learning adventure.
My suspicions were confirmed today at the airport when I gave the ticketing agent a bag that was over the limit by 2 kg. Of course, I offered to rearrange some things or pay the £25, as I had seen this guy be a stickler to two other people who went to his weigh station.
However, I was in luck because the guy responded that he only makes people speaking English (and all Brits no matter if they speak French) pay the fee. Since I was an American speaking French, I saved myself about €27/$36.
Okay, off to Oz!