There is actually something for the Speccy that is sort-of-a-Twine: https://github.com/cronomantic/ChooseYourDestiny
In fact, I used it for one of my games (a ZX Spectrum adaptation of the 1930 gamebook "Consider the consequences!" https://unapersona-y-otrapersona.itch.io/consider-the-consequences) and there are many more games using it. E.g. https://cperezgrin.itch.io/la-ciudad-a-oscuras-spider-man