There’s nothing malign about this sign. It could be construed as being anti-foreigner, it might be mis-interpreted. But what happened was the man painting the sign, organising the languages, became understandably confused.
Chang suggested he “delete zero” to bring toilet entry prices in line with other users. The sign designer saw sense in this idea. It clearly wasn’t fair. He deleted the zero. Now all you foreigners can pay local rates for services! I’m not sure I’d take a bath! Looks a bit of a rip off!