This WeakAura is made for warrior to warn you if Nefarian or Onyxia is casting the fear and if your Berserker Rage is up. Then you should not check yourself which cast is it and if your CD is up.
If Nefarian or Onyxia is casting the spell Bellowing Roar and if your spell Berserker Rage is up the logo of the spell Berserker Rage will appear on your screen.
The WeakAura is made for WoW in French you can just change the name of the spell to update for WoW in English