Is there a way to capitalize a string using batch rename regex in Bridge?

i just stumbled over this old topic while searching for something else. I wrote a script here:

https://community.adobe.com/t5/bridge-discussions/script-to-batch-rename-as-title-case/td-p/14319096#U15289024

For what it is worth, here is an example, changing testing_testing_hello_01.txt to testing_testing_Hello_01.txt

Just stumbled over this old post…

Bridge appears to use regex more for the search, the replace is limited and back-references to capture groups such as $U1 or U$1 don’t work to change case.

A hint can be found here:

Renaming images in bridge

I found a “solution” which works for two words separated by a space, however it is not pretty and if there are more words, then it would require more work. This is needlessly complicated, however it is what I came up with (I would hope that there are more elegant and robust methods than this).

If this could be scripted (rather than use Batch Rename), then it would be much easier to run a script that used a very simple JavaScript based regex to find (\b\w) however it all relies on the uppercase replacement being accepted, which I am not sure about… Of course, if Adobe simply offered a Title Case option in addition to the other case options, then we would not have to try so hard to work around these shortcomings in the software.