I realize this might be a long shot.. but I am a long time user of N++. I don't think this is currently implemented and apologies if there is another issue open... but would it be possible to add Json5 highlighting via the json5 file extension? It seems like there may be a way to hack the highlighting a little by using JavaScript highlighting instead as that seems to be close; however, if I choose JavaScript highlighting, it's not very good..

I really really x1000 do not want to move to another editor for this support. I tried atom and it seemed like it had support, but I want to continue to use N++.

This is what I currently get using JavaScript highlighting.

This standard json highlighting is much more palatable.

I may be a long time user of N++ as a software engineer, but I have never gone past the basic UI or twiddled any settings. If there is another way to achieve better highlighting, I am all for it.