Language used by setup-x86_64.exe

[Takashi Yano]

Recent cygwin setup-x86_64.exe has Japanese translation and
it uses Japanese when it is running in Japanese Windows.

However, sometimes I would like to setup-x86_64.exe with
English. I tried:
LANG=en_US.UTF-8
LC_ALL=en_US.UTF-8
LANGUAGE=en
however, all of them did not work.

Is there any way to force setup.exe to use English?

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>