"The actor performs as a judge."

Translation: La aktoro rolas kiel juĝisto.

[Butono14]

Help! kiel vs tiel in this sentence is confusing.

[mihxal]

kiel - like, as; how

tiel - in that way, so

tiel... kiel... - as... as...

[AjxojLerni]

why no accusative?

[Kivolamuzikisto]

If you mean for "juĝisto", in this sentence it's not the DIRECT object of the verb; "judge" isn't receiving the action, rather the acting is AS/LIKE a judge. So it's kind of like "estas" showing the state of quality of the actor.