Qt and xfce and a bunch of greek letters

Question

first of all i googled my self into some of this conclusion so let's see my case
all programs that use qt in my computer have a strange way to comunicate with the user. for that they use a greek letters that we mentaly have to see similarities in order to read!!!
a bunch of programs in greek.
notepaddqq
vlc
on qtconfig-qt4 we can see what went wrong in the first image, we have a font called Standard Simbols L and just looks like Greek
here i select tahoma font and the sample is now readable
the problem is when i save changes and close it. it doesn't save anything,
and a little bit of information when i do su every program runs in english
here is the config with tahoma
check that strange font here when i selected it
i use greybird as my theme, (i read that could be for this somewhere)
and my locale is set this way
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
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=

Answer 1

that file is another issue. it is created when i open any qt program. i already deleted it. and call qtconfig-qt4, deleted and call vlc and is same old greek. i even edited it to tahoma instead of standard symbols L. i already ran qtconfig then rm it then save the configs (in this case it saved tahoma in the file).  i don't know what else to do with that file. maybe a copy paste from a functional one would resolve it but I doubt it.
Thanks