"I eat eggs."
Translation:Jag äter ägg.
Think of it like this, you would not say "I eat egg", you would say "I eat an egg", in which case it would be "Jag äter ett ägg"
I was thinking of the same example. But in this case, interpreting it as "I eat eggs" would mean the same thing.
all neuter nouns ending in a consonant are unchanged in the plural. (from wiki). so it's only about the neuter nouns.