Rather than looking at linguistic differences, this barber shop chooses to emphasize what is shared between two languages.
Not meant to save space, I wonder if the sign is trying to highlight that we may be more connected than we think.
The English-speaker wandering down this Italian street does not need to feel quite so disconnected from the locals passing by.
No matter what language you speak, hair grows from your head and barbers are there to help.
Perhaps this barber, whose business it is to separate us from our hair, is trying to help get around language barriers and bring people together.