it isn't
La gente insiste en que es hermosa, pero en realidad no lo es.
People insist that she’s beautiful, but in reality, she isn’t.
Tom es muy fotogénico, ¿no lo es?
Tom is very photogenic, isn't he?
A eso no le contestaré que es obvio, porque no lo es.
I won't answer that by saying it's obvious, because it isn't.
— El hoyo (2019)
Tom está siendo un embustero, ¿no lo es?
Tom is being a liar, isn't he?