Well, listening to some of the examples in the article and trying my luck, the first thing that comes to my mind is that maybe they should complement the challenge- if not replace altogether- with a pronunciation bee. Opificer is read as "huh-pificer", but the common pronunciation, and the only one that makes sense to me, is "oh-pificer" (the stress varies freely as well in all the examples I found online). Hechsher (presumably with a hard "ch" sound) is pronounced heksher. The french word "Beurre" is happily pronounced "bur", without any attempt to a french sound. Don't know enough Spanish tell the correct pronunciation of Pejerrey but I'm pretty sure it's not "payray". If this is how it works, it seems a double challenge: first guess which word they're actually trying to pronounce, then write it down correctly.