One way to do it is have a small Python (or any other scripting language really) script that performs text replacements in the Latex source file. This is much easier in Latex because it’s plain text. I don’t know of a solution that doesn’t involve writing your own code (apart from LO/Word serial letters).

Is using Latex an option? I’ve done that and it works quite nicely. You can easily populate a template e.g. using Python.

I would argue that any majoritarian electoral system (winner-takes-all), including ranked choice, incentivizes large parties. There is some nuance between them, but I don’t think that ranked choice can fundamentally solve that issue. Sure, you can enter a protest vote, but will it really change anything? I think that parties need realistic changes at gaining (some) power in order to be viable in the long term.

Would you mind explaining how introducing ranked choice voting would substantially help smaller/additional political parties? I always find it confusing how much Americans focus on the presidency and ranked choice voting when it comes to breaking the party duopoly. At the end of the day, there is only a single president and he/she will probably always come from one of the largest parties. The presidency somewhat inherently limits the influence of smaller parties.

What I would focus on, if I wanted to increase the number of political parties in the US, is the House of Representatives. If proportional representation (e.g. biproportional appointment, party lists, MMP, …) was introduced there, it would allow smaller parties to hold real power. (With biproportional appointment, the seats are distributed according to party voter share while also ensuring regional representation). Do you know why this hardly ever comes up in the context of the US?

Switzerland has since introduced a law that changed this to self determination.