Over the years I have come to the conclusion that I am not a linguist. I have a smattering of French I can use but no French person has ever felt it useful enough to continue talking in their own language once I begin.
By and large, around the world, English works. There was a heroic effort to construct a world language, reversing Babel, with Esperanto but it didn't really catch on.
Now I have read about a system that tries to take the fact of English's ubiquity and use it to create a world-wide language - Globish. The idea is that English be reduced to a core minimum of words from which all concepts and missing nouns can be constructed - thus, according to an article in the Observer, tomato becomes round red fruit and kitchen, room in which cooking takes place.
Follow this link to the list of 1500 words.
It would be interesting. My penchant for words such as ubiquity (and penchant) would have to be cured. And, of course, a certain clarity of sentence construction would be required. I think it might be beyond the wit of my Leamington window cleaner who didn't know 15 words of English and would greet me with:
orroiwinderscaniavsum wa'er nowarreye mean?
Translations available on request.