"How many languages do you speak?"
Translation:Kiom da lingvoj vi parolas?
I wrote "Kiom da lingvoj parolas vi", and it marked it as wrong. It shouldn't matter where the 'vi' is in this case.
"Kiom da lingvoj" is a direct object phrase for the verb "parolas", so I used the -n suffix to signify this and entered "kiom da lingvojn vi parolas" as my answer. It was marked wrong.