Jennifer Hodgdon's Language Switcher plugin, maintenance.

Is anyone maintaining / developing Jennifer Hodgdon’s Language Switcher plugin ? She stopped several years ago (because she stopped using WordPress).
It’s a lightweight, effective piece of code and I’ve been using it for years. However, I strongly suspect that the code is no longer best practice as far as WordPress is concerned.
I’ve been trying others, but can’t get on with them. They seem to either be a pretext for advertising translation services or with features that are unnecessary or buggy.

I’m not a php wizard, but I’m willing to work with someone to get this plugin up to speed.