@Albert Astals Cid, output of locale command is below. Also, I attached /usr/share/glib-2.0/schemas/org.gnome.desktop.background.gschema.xml file.
locale LANG=tr_TR.UTF-8 LANGUAGE=tr:en LC_CTYPE="tr_TR.UTF-8" LC_NUMERIC=tr_TR.UTF-8 LC_TIME=tr_TR.UTF-8 LC_COLLATE="tr_TR.UTF-8" LC_MONETARY=tr_TR.UTF-8 LC_MESSAGES="tr_TR.UTF-8" LC_PAPER=tr_TR.UTF-8 LC_NAME=tr_TR.UTF-8 LC_ADDRESS=tr_TR.UTF-8 LC_TELEPHONE=tr_TR.UTF-8 LC_MEASUREMENT=tr_TR.UTF-8 LC_IDENTIFICATION=tr_TR.UTF-8 LC_ALL=
@Albert Astals Cid, output of locale command is below. Also, I attached /usr/share/ glib-2. 0/schemas/ org.gnome. desktop. background. gschema. xml file.
locale "tr_TR. UTF-8" tr_TR.UTF- 8 "tr_TR. UTF-8" tr_TR.UTF- 8 "tr_TR. UTF-8" tr_TR.UTF- 8 tr_TR.UTF- 8 tr_TR.UTF- 8 tr_TR.UTF- 8 ON=tr_TR. UTF-8
LANG=tr_TR.UTF-8
LANGUAGE=tr:en
LC_CTYPE=
LC_NUMERIC=
LC_TIME=tr_TR.UTF-8
LC_COLLATE=
LC_MONETARY=
LC_MESSAGES=
LC_PAPER=
LC_NAME=tr_TR.UTF-8
LC_ADDRESS=
LC_TELEPHONE=
LC_MEASUREMENT=
LC_IDENTIFICATI
LC_ALL=