If u equip 1 legendary weapon u get special footprints depending the legendary weapon. If u equip a second legendary (main and offhand): which footprints do u get? from main or offhand or double special footprints?
Just the main hand. Always the main hand.
Sadly off-hand legendary footprints will only show up if you don't have a legendary in your main-hand. There is no way to combine them or prioritise the off-hand footsteps even though players have been asking for it since shortly after the game came out.
Danielle Aurorel, Desolation EU. Mini Collector
"You can run like a river, Till you end up in the sea
And you run till night is black, And keep on going in your dreams
And you know all the long while, It's the journey that you seek
It's the miles of moving forward, With the wind beneath your wings"
I've always wanted Anet to make every other footstep to be the offhand footfall of your legendary if you have a main hand legendary equipped a well, so you get to see both.