Es todo pura fachada

[ROBINDESBOIS]

Cuando alguien finge y parece muy amable, pero no es como pensamos, decimos que es todo pura fachada. In English?

[Perikles]

It is all a facade. :whistling:

[Rusty]

It's just/all a front.
It's just/all an act.

It's all make-believe.

[EmpanadaRica]

Maybe also he/she's fake/ all fake. :)
It's all fake.