increasing or removing character limit

Is there anyway to increase or remove the 25 character limit when renaming units ingame (for instance, '1st Regiment, 3rd Infantry (Africa Corps)')? I'm assuming its located in the game code somewhere as its possible to do it in Civ 5 but I don't know whether its in xml, python etc.

Unless you're trying to give things ridiculous names (really, 25+ characters?), I would advise against doing so - this game was made 7-8 years back, and these character limits are implemented (or just "there" by default) to prevent crashes due to inherent functional limitations of the program and/or the language used to write it.

As an example, Python has problems consistently dealing with file paths names and/or file names that are long, particularly when used in the implementation of a 3rd party platform (i.e. ArcGIS).