bug#27505: LC_CTYPE affects tutorial language

[Leonard Lausen <leonard@lausen.nl>]

Dear all,

as far as I know the environment variable LC_CTYPE applies to
classification and conversion of characters, and to multibyte and wide
characters. So setting it should not influence the interface language,
correct?

However, with the following locale:
LANG=en_US.UTF-8
LC_CTYPE=zh_CN.UTF-8
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE=C
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

I find that the emacs tutorial (C-h t) is displayed in Chinese.

Is this expected behavior or a bug? This may or may not be related to
bug#27312 where I reported that I can't activate fcitx even though env
is set up correctly.

(I.e. the following is the first line of the displayed tutorial:
Emacs 快速指南.（查看版权声明请至本文末尾）)


> 
> In GNU Emacs 25.2.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.15)
>  of 2017-06-10 built on leonard-xps13
> Windowing system distributor 'The X.Org Foundation', version 11.0.11903000
> Configured using:
>  'configure --prefix=/usr --build=x86_64-pc-linux-gnu
>  --host=x86_64-pc-linux-gnu --mandir=/usr/share/man
>  --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc
>  --localstatedir=/var/lib --disable-dependency-tracking
>  --disable-silent-rules --docdir=/usr/share/doc/emacs-25.2
>  --htmldir=/usr/share/doc/emacs-25.2/html --libdir=/usr/lib64
>  --program-suffix=-emacs-25 --infodir=/usr/share/info/emacs-25
>  --localstatedir=/var
>  --enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp
>  --with-gameuser=:gamestat --without-compress-install
>  --with-file-notification=inotify --enable-acl --with-dbus
>  --with-modules --with-gpm --without-hesiod --without-kerberos
>  --without-kerberos5 --with-xml2 --without-selinux --with-gnutls
>  --without-wide-int --with-zlib --with-sound=alsa --with-x --without-ns
>  --with-gconf --with-gsettings --without-toolkit-scroll-bars --with-gif
>  --with-jpeg --with-png --with-rsvg --with-tiff --with-xpm
>  --with-imagemagick --with-xft --without-cairo --with-libotf
>  --with-m17n-flt --with-x-toolkit=gtk3 --without-xwidgets
>  GENTOO_PACKAGE=app-editors/emacs-25.2 'CFLAGS=-march=native
>  -mtune=native -O2 -pipe' CPPFLAGS= 'LDFLAGS=-Wl,-O1 -Wl,--as-needed''
> 
> Configured features:
> XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
> NOTIFY ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB GTK3 X11
> MODULES
> 
> Important settings:
>   value of $LC_COLLATE: C
>   value of $LC_CTYPE: zh_CN.UTF-8
>   value of $LANG: en_US.UTF-8
>   value of $XMODIFIERS: @im=fcitx
>   locale-coding-system: utf-8-unix
> 
> Major mode: Lisp Interaction
> 
> Minor modes in effect:
>   tooltip-mode: t
>   global-eldoc-mode: t
>   electric-indent-mode: t
>   mouse-wheel-mode: t
>   tool-bar-mode: t
>   menu-bar-mode: t
>   file-name-shadow-mode: t
>   global-font-lock-mode: t
>   font-lock-mode: t
>   blink-cursor-mode: t
>   auto-composition-mode: t
>   auto-encryption-mode: t
>   auto-compression-mode: t
>   line-number-mode: t
>   transient-mark-mode: t
> 
> Recent messages:
> For information about GNU Emacs and the GNU system, type C-h C-a.
> Making completion list... [2 times]
> delete-backward-char: Text is read-only [3 times]
> Making completion list...
> 
> Load-path shadows:
> None found.
> 
> Features:
> (shadow sort mail-extr emacsbug message dired format-spec rfc822 mml
> mml-sec password-cache epg epg-config gnus-util mm-decode mm-bodies
> mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
> rfc2047 rfc2045 ietf-drums mm-util help-fns help-mode easymenu
> cl-loaddefs pcase cl-lib mail-prsvr mail-utils time-date mule-util
> china-util tooltip eldoc electric uniquify ediff-hook vc-hooks
> lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd fontset
> image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode
> prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
> mouse jit-lock font-lock syntax facemenu font-core frame cl-generic cham
> georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
> korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
> european ethiopic indian cyrillic chinese charscript case-table epa-hook
> jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
> loaddefs button faces cus-face macroexp files text-properties overlay
> sha1 md5 base64 format env code-pages mule custom widget
> hashtable-print-readable backquote dbusbind inotify dynamic-setting
> system-font-setting font-render-setting move-toolbar gtk x-toolkit x
> multi-tty make-network-process emacs)
> 
> Memory information:
> ((conses 16 86605 6233)
>  (symbols 48 19787 0)
>  (miscs 40 46 96)
>  (strings 32 14398 4574)
>  (string-bytes 1 414247)
>  (vectors 16 12192)
>  (vector-slots 8 484142 16017)
>  (floats 8 167 9)
>  (intervals 56 279 0)
>  (buffers 976 19)
>  (heap 1024 16015 1078)