What way would you recommend to make a multilingual Landing Page and why?

Question

Database

I'm making up a simple one-pager: several screens, a menu, a feedback form. According to the assignment, there should be two languages ​​and the ability to add new ones quickly in the future. How would it be more correct in terms of logic and SEO optimization to complete this project? I work without CMS. So far, I have chosen the option with variables instead of strings that are loaded from the database into a separate file.

Answer 1

https://jsfiddle.net/yaskin/ozLyjts5/4/

Answer 2

you can use this for example

Answer 3

We can use, for example, Modx (CMS), with it you can make multilingual sites without much difficulty.

Answer 4

I use this one - https://www.youtube.com/watch?v=Tjt_u_OSh40&list=L...
Just right for landings.