Esperanto. It's an artificial language designed to be easy to learn and communicate in. Although it's worth noting that there are esperanto dialects and speakers of one don't necessarily understand speakers of another.
Ask Phoenix Jones. He did exactly that for three years, although he never actually tried to conceal his identity. He retired from superheroing to be an MMA fighter.
I count Ripley following protocol and refusing to open the airlock for a contaminated crewmate. If Ash hadn't stepped in, the movie would have ended very differently.
The history of rum is really interesting! French sugar plantations in the Caribbean started making it to earn money off waste sugar cane. Wine makers in France bribed the king to ban the import of rum, so it became a popular barter good, and in some places a de facto currency, around the Caribbean and part of the American East coast.
Never tried it, but I've heard that Applejack hangovers are pretty fierce. The alcohol is concentrated by repeatedly removing a cap of ice, so the toxins that are usually filtered out by distillation are at full strength.
I always thought they'd sound like coconuts when they rammed together.