It can't hurt to be bilingual. In fact, the more languages you learn, the better your chances are of landing a job. Plus, it's always nice to be able to speak to people that come from other places, especially since it's so easy to connect with them over the internet. If you're ready and willing to learn, here are a few different ways to say, "hello" from languages around the world:
You probably already know that "hola" is the Spanish word for "hello." Most people are aware of the fact, which is why you could use it as a greeting and you won't end up confusing anybody.