How to display a toggle button?

[Demian101]

I want to know how to display a toggle button on my homepage after configuring the language folder, so that I can switch languages?

I looked at dojo's mdbook, and they seemed to have manually written some JavaScript dom code?

Is there some convenient way for me to add this toggle button to mdbook?

PLS ~

[mgeisler]

It looks like this is a duplicate of #99.