This forum is "Caribbean and Latin America". Languages in the region include Spanish, French, Dutch, Portuguese, Papiamento, a smattering of others and, oh yes, English.
Aviation and ATC by custom and ICAO regulation use English as the primary language.
Now, since all aviators know at least a bit of English, and everyone in this forum is involved in aviation, which language would work best?
I don't care about the rest of you, I'm voting for Papiamento.