How can I make custom ammo for my Swep?

How can I add custom ammo to my swep? I tried using
language.Add(“sniperpenetratedround_ammo”, “Tactical Assault Ammo”)
And I just get this error:

weapons/weapon_xm8/shared.lua:139: attempt to index global 'language' (a nil value)

if anyone can help that’d be :tubular:

Where did you put “language.Add”? It should go to the weapon base cl_init.

I put it there and nothing happened.