I will have to tick other because I speak the traditional English version of the International language
Esperanto,
Although the language of Esperanto was developed to ease the idiosyncrasies found when attempting to learn a foriegn language, it still takes time and effort to master.
With the English version however such effort and dedication is not needed, because wherever you are in the world you can just plonk yourself down in a cafe and if they didn't understand you the first time you just repeat your order a little louder, if again they don't understand you a further increase in volume until at last they take the bother to listen to what you said and hey presto you get served!
Dr. Ludovic Lazarus Zamenhof
Developer of Esperanto