I would avoid using words that will confuse clients, if they are for a standard service and defianatly use a short description.
But you can still use more attractive words e.g. demi=glossing, toner=glaze, face framing highlights, I even think just saying "permanent colour" sounds nicer than "tint" for some reason.
You could add techniques such as balayage/hair painting, ombre as long as they mean something.
It's like looking a menu in a restaurant, if I can't even pronounce one of the items, there's no way I would order it!
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