Hello Suededevil!
I would think, 'Sublimate' would apply to the wilful aggrandisement of something mundane to a more profound state. Akin to something many new age gurus with the right marketing strategies, do: 'sublimate' ordinary everyday wisdom to the lofty standards of philosophy!

It seems more appropriate to apply this word to theories, ideologies or priniciples. In general, anything abstract. Language is anything but abstract and so, to use this, to indicate a desire to improve one's command over the language, does not seem to be quite right. I, at least, have not heard it used this way.

Moreover there is a clear sense of a deliberate act, with sublimate; as in, when you sublimate something, you are deliberately altering its condition to a falsely exalted one.