Making gatsby-plugin-react-i18next respectful of storage preferences

[giyokun]

Hello,

I am an old guy learning React/Gatsby from more or less zero (including JS) to build a new corporate website.
Lots of fun but still not always very easy.
For my needs, I would like to be able to ask gatsby to change the way it keeps its preference from localStorage to a session cookie depending on a flag I would set.
The idea would be to be more respectful of website visitor preferences regarding choice of cookies (and other) storage.
Would anyone know the right way of doing that?