My favorite translator is on vacation, so I have to rely on Google translate, which renders Pierre as "stone." Go figure. But hey, at least it gives an idea.

When stone (Pierre) left for the war seven years there remained
Has left his crumb to grenoble dying of regrets

The first letter that received the stone (Pierre) was full of flowers
The second letter that received the stone (Pierre) was full of tears

Went to find his captain give me my leave
To go see my grue in grenoble which is surrounded by regrets

But when he was on his hills he heard him ring
To those who carried her in the ground let me kiss her

The first time stone (Pierre) kisses stone (Pierre) sighed
The second time stone stone (Pierre) embraces

What do you think grenoble people of this love there
Lie down one against the other, they both sleep

No doubt, I'll get a sound scolding for posting a translation like this, but it's a start.