Negative Lookbehind(?<!\S) \Sany character that is not Unicode whitespace
Negated Character Class[^,]* *matches any number of characters outside the set below:
,the literal , (4410 / 548 / 2C16)
\ba Unicode word boundary
chargthe literal text charg (case insensitive) \w+a Unicode word character, repeated at least once
\ba Unicode word boundary
Negated Character Class[^,\d]* *matches any number of characters outside the set below:
,the literal , (4410 / 548 / 2C16)
\da Unicode decimal digit
\d+a Unicode decimal digit, repeated at least once
Non-Capturing Group(?:\.\d+)? ?repeats the group contents below at most once:
\.the literal . (4610 / 568 / 2E16)
\d+a Unicode decimal digit, repeated at least once
Wthe literal W (8710 / 1278 / 5716) (case insensitive)
\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
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters