Known all over the Universe.
eet ees Eeengleesh
I think you are talking about Esperanto but it's only spoken by a few million people.
..and it's not new :)
It was made less than 200 years ago, as far as human languages go that's about as close to new as you can get.
English. How can there be an International language that no one knows about? It is English. Spoken even in the poorest of countries.
I would go with Spanish it is much easier to learn.
Even though i do not remember any of it any longer do to my friends and i have gown our own ways years ago.