The keys diet:vegetarian and diet:vegan allow three values: yes, no and only. Here are some more details:
This is particularly helpful to avoid the spread of cuisine=vegetarian/vegan, which is deprecated.
I could see adding multicombo field for diet: as a moreField (recently added in #5582) .
I definitely don't want to add checkboxes for every kind of diet: that people think of.
I could see adding multicombo field for
diet:as a moreField
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鈽濓笍 I did this