Honestly, I don't care particularly much which exact word it becomes just as long at isn't some 'cute' or obscurse[1] word.
'magic' belongs in the 'cute' category, I think and 'bespoke' belongs in the latter. I'm native German. I never was in any English-speaking country in my life. Almost all my English media is from the USA. I'm not a tailor. Yet "bespoke" was familiar and instantly tells me what's important. So I may just be one point on the map, but I am not sure your argument that it is "obscure" is valid, sorry.
That being said, let me add a package of "awwww"s for all the times an English native complains that he has to learn a new word to program. Take a portion and pass it along, would you? ;) Apropos learning words: while searching for information if "bespoke" is really obscure (I found none in either direction) I stumbled upon some (I think) not-yet-mentioned possible options * custom(i[zs]ed)? * tailored * idiosyncratic (uh, yeah!) Yet my vote is with "bespoke". Short, informative, recognizable, and a nice balance of quirky and reasonable, just like so much else here. Cheers, MarLinn