Questions & Answers about Vi hade många röster, men de hade fler.
Why is "more" translated as fler here instead of mer?
Because we are talking about röster (votes), which are countable things. Fler is the comparative form of många (many) and is used for things you can count. Mer is the comparative of mycket (much) and is used for uncountable things like water or time.
Can fler stand alone at the end of the sentence like that?
Yes! Because we already mentioned röster earlier in the sentence, we don't need to repeat it. It is perfectly natural to drop the noun if it is obvious from the context, just like saying "they had more" in English instead of "they had more votes".
Does röster mean "voices" or "votes"?
It means both! The word en röst translates to both "a voice" and "a vote" in English. Here it makes the most sense as "votes", but depending on the context, it could absolutely mean "voices".
I always forget, is de pronounced the way it is spelled here?
In everyday spoken Swedish, de (they) is almost always pronounced as dom. You will usually only hear it pronounced as it is spelled in very formal situations, like singing or reading poetry out loud.