Use of {chugh}

["Scott Willis" <magicspiderwebb@hotmail.com>]

I need an opinion:

I want to say "If you must speak, speak Klingon"
Is it better to say:
{bIjatlhnISchugh, tlhIngan Hol yIjatlh!}
or
{bIjatlhnISchugh, vaj tlhIngan Hol yIjatlh!}

If I were to say the first, would my point get across? Is the {vaj} required?

--ngabwI'
HovpoH 699677.7