[R-SIG-Mac] character encoding problem during startup

[XIAO Wendi]

Dear all,
After opening the program there are always warnings about language setting:

During startup - Warning messages:
1: Setting LC_CTYPE failed, using "C"
2: Setting LC_COLLATE failed, using "C"
3: Setting LC_TIME failed, using "C"
4: Setting LC_MESSAGES failed, using "C"
5: Setting LC_PAPER failed, using "C"
[R.app GUI 1.52 (6188) i386-apple-darwin9.8.0]

WARNING: You're using a non-UTF8 locale, therefore only ASCII characters
will work.
Please read R for Mac OS X FAQ (see Help) section 9 and adjust your system
preferences accordingly.

My computer is a Mac OS 10.6.8.
I look forward to your reply.

Best Regards,
Wendy