Chinese Characters in the "Function" App/Numeric View

[Hans S.]

Hi everybody,
Today I encountered a behavior that seems to be somewhat strange. Is this a known bug? If so, I beg your pardon, but I didn't find this mentioned in the net.

App: "Function"; enter a function in the symbolic view (any should work)
Language: German, Englisch, Netherlands, Francais, etc., not tested with Chinese/Japanese etc.
Push the "Num" button. Left (X) column should be highlighted.
Push the "Defn" soft-button. Wenn moving to "Defn." (WITH the bullet!) the prime shoud say "Vars". So it does sometimes, but this happens not consistently. Sometimes (try to put in another function, or change the function, i. e. play around, can't it provoke it every time, but changing the function two or three times should do it) instead of "Vars" you (at least I do so) see chinese (japanese/korean?) characters - only on the physical Prime.

Yes, I know about my bad karma.

Regards,
Hans