CatBus said:
First things first – if at all possible, always base new subtitle contributions on the latest version of this project. It saves me a ton of time, and I’m always making minor adjustments that don’t even make the changelog (“subtitle #33 appears one frame later”, etc).

I looked in the swedish guidelines and they do use square brackets and colons too. No need to change any scripts for this.
I am not interested in changing the swedish subs more then adding the SDH lines and re-aline the text with the timing of the SDH subs.
Send me the files and I will give it a go 😄