Which RegEx syntax does Gramps use?

[emyoulation]

@prculley

Gramps uses the Python version of regular expressions re — Regular expression operations — Python 3.10.2 documentation

in the documentation you cited, the following note is in the opening section of the docs.

See also

The third-party regex module, which has an API compatible with the standard library re module, but offers additional functionality and a more thorough Unicode support.

Given that Gramps is heavy in Unicode use (and the recent inquiry about Case Sensitivity not being controllable), is that third-party regex more appropriate for Gramps than the standard library re module?