\ba Unicode word boundary
\p{Lu}an uppercase letter
\p{L}*any Unicode letter, repeated any number of times
\ba Unicode word boundary
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string
u modifier: unicode. Treats the pattern and subject as UTF-16