What's the easiest language to learn?

I'm planning on learning a few languages, and I want to start with something easy. Thanks for reading.

If your native language is English then you should find Spanish and French rather easy.

If you're looking to build a good foundation and a way to teach you a lot about grammatical rules then start with Esperanto. It's a synthetic language that is incredibly simple. It's pretty much useless aside from building a base.