Customisable overlay / latency readout

I realise this isn't functionality that is core to the way ReShade works but it'd be great if I could see a latency readout on the overlay in-game.

This could ideally be to the in-game server but I realise that information isn't necessarily easily accessible (although I suppose it could be if it was a steam game). But even if it was just pinging an address that I entered into a configuration file (for instance www.google.com or my nearest ISP hop) this would be great.

Alternatively, is there an easy way to edit the overlay and add custom information which could be updated at regular intervals? If so I'd consider trying to write a 'ping' plugin myself although it's outside my normal coding skillset.

Cheers and keep up the great work!