Mandarin-style text in System Preferences

i've never had problem imac until now, i've scowered internet try , understand why happening i'm finding pretty hard dont know going on.

time mandarin style text occurs on system preferences when try alter something. doesnt affect usability, odd!

know why?

 

it's not mandarin. it's japanese.

seemed have picked japanese second preferred language in "language & text" pane in system preferences. second preferred language 繁體中文 (traditional chinese) , showed chinese in password window when tried alter setting in system preferences. sometime happened in password window when installing new apps.

 

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