I feel like I need to point out that the XIVChat plugin – which, IIRC, is on the official plugin repo – lets you use a windows OR android client as a two-way interface to your in-game chat. That is, there is both a windows client and an android one that can connect to your game via the plugin, and you can even set it up to work across the internet instead of the same network, and those client both receive and send chat.
More generally, the XIVLauncher “community” takes only a soft stance against sending data to the server. Official plugins are not allowed to do it, but there’s been built-in full support for “unofficial” plugin repos for a while now, operating through the in-game plugin installer rather than requiring manual compilation and installation.
@kit, I believe the Chat Extender plugin is long deprecated and nonfunctional, too.