What engine can be used to implement a visual novel?

Question

Mobile development

What engine can be used to write a visual novel for mobile devices?

Of the requirements:
- Availability of flexible navigation (menus, subsections, settings, content filtering);
- Maximum freedom of customization, adding new features, actions, pop-ups, etc.
- Ability to create a "Catalogue" of stories, inside which series / seasons
- Optimization of performance, support for mob. devices

I don't really understand how things are in game development, I heard about Unity out of the corner of my ear. I want to start to understand, step by step. There is experience in web development, taking advantage of the experience of education in this area, there are several additional ones. questions.

1) Everything is written manually from scratch or there is something similar to a CMS for sites where there is an already implemented file hierarchy
2) What programming languages ​​do you need to learn for this task?
3) If there is an opportunity to give additional guidelines, I will be grateful!

Answer 1

Well, I think RenPy is a good choice. Used by Python. It is very easy to learn, and there is built-in training for it. Lots of tutorials on YouTube.

Answer 2

I would choose Love2d for this (partly because I don’t know anything apart from lua)
pros:
a very simple language, namely lua
there is cross-platform (android, linux, windows)
there are built-in libraries for graphics
speed of work
cons:
write everything yourself, no constructors (no one forbids writing this constructor)
and so you can write on anything

Answer 3

there are a number of assets for unity, for visual novels, both paid and free