deltasalmon:

Machjo:I've made name cards in Esperanto and hand them out like any other name card.  If the person know, Esperanto, we might both get a pleasant surprise.  And if not?  Well, if he says nothing, then obvioulsy he's really not interested in language anyway.  And if he notices and asks what language it is, or any other question about it, I'll answer his questions, no more, no less.  This helps keep the suspense up a bit.  And if he asks why the card is in Esperanto, well it's to meet Esperanto-speaking friends of course;  Why else would the card be in Esperanto?

Speakers of the Irish language used to wear golden ring pins on their shirts called Fáinne Óir to let people know they speak Irish. I was thinking about the same idea but with a green star pin or something similar.