How?
How did she communicate?
Princess Alice's mother noticed that she was slow in learning to talk, and became concerned by her indistinct pronunciation.
Her grandmother, Princess Battenberg, identified the problem and took Alice to see an ear specialist. She was diagnosed with congenital deafness.
With encouragement from her mother, Alice learned to both lip-read and speak in English and German. By the age of eight she had become a fluent lip reader.
She was educated privately and studied French. Later, after her engagement to Prince Andrew of Greece and Denmark, she learned Greek.
A leaflet with a drawing showing Queen Victoria using sign language at the bedside of a 'deaf mute'.
Source: Museum of London
Some say it was Queen Alexandra from Denmark who taught Queen Victoria to fingerspell. Source.