If not possible… maybe would be useful in the future
add a new tab in “Define your Language” named “Other” (or ???)
and add the option to colorize/style all line when hit a defined regular expression…

In my case:
I need to colorize all line when ^$line:$ is found
or colorize a block of lines when ^$block:(.*)^$ is found

Observing by the quantity of requests I’ve found when ‘Googling’
for this it would be a very useful feature…
and would avoid installing some plug-ins just for this

**
I will put the search for this funccionality
in another question for a very simple code snippet
to build a simple plugin…

TIA