Will it hurt you in getting a job as a corporate flight attendant if you aren't bilingual? I read that in order from working with catering companies around the world, your employers want you to be bilingual. What is the best way to work around that if you only speak one language?

Be bilingual is always helpful in the aviation industry, but it is not necessary, unless a particular contract or company requires it.

Being bilingual is helpful, but not mandatory.
You should be judged on your experience and skills.