Losing non-latin symbols with X-clipboard in urxvt

Question

I seem to have a problem with x-clipboard and urxvt. Whenever I copy explicitly via x-clipboard all of my non-lating characters turn into a strange symbol. Interestingly, selecting a text followed by middle mouse button works correctly and the text is copied with no loss in non-lating symbols.
I've found a similar post on the forum:
https://bbs.archlinux.org/viewtopic.php?id=141785
but my situations is not quite the same. Even if I copy from urxvt into urxvt say from one instance of vim to another the effect I described occurs.
This is exactly what's happening to me
http://lists.gnu.org/archive/html/emacs … 00177.html
but the thread seems discontinued.
By the way here's my locale
[~]%locale
LANG=en_GB.utf8
LC_CTYPE="en_GB.utf8"
LC_NUMERIC="en_GB.utf8"
LC_TIME="en_GB.utf8"
LC_COLLATE="en_GB.utf8"
LC_MONETARY="en_GB.utf8"
LC_MESSAGES="en_GB.utf8"
LC_PAPER="en_GB.utf8"
LC_NAME="en_GB.utf8"
LC_ADDRESS="en_GB.utf8"
LC_TELEPHONE="en_GB.utf8"
LC_MEASUREMENT="en_GB.utf8"
LC_IDENTIFICATION="en_GB.utf8"
LC_ALL=
And locale -a
locale -a
C
en_GB
en_GB.iso88591
en_GB.utf8
pl_PL
pl_PL.iso88592
pl_PL.utf8
polish
POSIX
Any hints would be of great assistance.

Answer 1

@Ranmaru;
already have it xD. I can't use middle click, no mouse and my touchpad's buttons are a bit off.
@Mr. Pedobear:
[hinagiku@alice-tan urxvt-clipboard]# locale
LANG=en_US.UTF-8
LC_CTYPE=ja_JP.UTF8
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=
[hinagiku@alice-tan urxvt-clipboard]# locale -a
C
POSIX
de_DE.utf8
en_US
en_US.iso88591
en_US.utf8
ja_JP
ja_JP.eucjp
ja_JP.ujis
ja_JP.utf8
japanese
japanese.euc
ko_KR
ko_KR.euckr
ko_KR.utf8
korean
korean.euc
Should I set LANG to ja_JP? Even without Japanese locale, backslash is displayed as Yen sign in terminal and Qt apps.