Using high-ascii chars for identifiers

For fun I started playing around with using high ascii charectors for some identifers.  For some reason, there are a few valid identifiers that get mistakenly flagged as an error.
As an example, I am using the Paragraph, Section, and Function ascii codes for shorthand namespace aliases:
http://youtrack.jetbrains.com/issue/WI-15538

All 3 work, however the Function code is flagged as an error.  I'm just curious if anyone knows of a quick way to re-define/exclude errors so I can use the charector without getting a big red underline on the file.

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