i guess incorrect translations and lack of detailed knowledge are the biggest contribution to eating the wrong plant. -- so my philosophy is "if in doubt -leave it out" (especially if you got bitten by a vampire )Yes, sorry!
Onion and bulb translate both to German Zwiebel. We just say Zwiebel and more precisely Blumenzwiebel. Or Tulpenzwiebel for tulip bulb.
I didn't know the word bulb.
I never heard about for humans toxic allium.
not related to onions, but yucca (cassava) is a common part of the local diet -- not for me anymore as i've gotten sick several times despite proper preparation... .so i'd recommend trying a small amount first when trying new wild edibles even if text sources rate them as good..