A year ago, I became fascinated by conlanging. So I set out to create one for my soon-to-be-completed world, but no matter what I came up with, the words sounded like English. It feels like I am just copying an existing language. After a bit of reading and watching videos on Atriflexian, I developed a little idea about phonotactics but never got around to my original problem.
Italian, Spanish, French, German, English... each of these dominant languages have common roots, but one will not confuse one language with another. Is there some concept that I might be missing?