Agda Baxisso in my system?

http://linuxos.sk/media/attachment/comments_comment/cd/283597/Screenshot_at_2018-04-08_19-10-46.png

The packages that are installed with Cubic or are recommended (optional) are listed in the file:

https://bazaar.launchpad.net/~cubic-wizard/cubic/release/view/head:/debian/control

I've listed these packages below.

You can check if any of the following require Agda Baxisso, but I haven't seen that before. Perhaps it was installed as a part of another non-Cubic related package?

                    gir1.2-gtk-3.0 (>=3.10.8),
# Required for libvte-2.91 (Ubuntu 15.04) or libvte-2.90 (Ubuntu 14.04)
                    gir1.2-vte-2.91 (>=0.38.3) | gir1.2-vte-2.90 (>=1:0.34.9),
# gksu (>=2.0.2) | kdesudo (>=3.4.2.4),
                    gksu (>=2.0.2),
# Required for python bindings for libappindicator3-1
                    python-appindicator (>=12.10.1),
# Required for python bindings for vte
                    python-vte (>=1:0.28.2),
# Required for pexpect.
                    python3-pexpect (>=3.1),
# Required for mksquashfs, unsquashfs
                    squashfs-tools (>=1:4),
# Required for chroot, du, mkdir, rm, wc; usually preinstalled
                    coreutils (>=8.21),
# Required for dpkg-divert; usually preinstalled
                    dpkg (>=1.17.5),
# Required for mkisofs; usually preinstalled
                    genisoimage (>=9:1.1.11),
# Required for grep; usually preinstalled
                    grep (>=2.16),
# Required for mount, umount; usually preinstalled
                    mount (>=2.20.1),
# Required for GTK3 Python Library; usually preinstalled
                    python3-gi (>=3.12.0),
# Required for rsync; usually preinstalled
                    rsync (>=3.1.0),
# Required for xhost; usually preinstalled
                    x11-xserver-utils (>=7.7),
# Required for xorriso
                    xorriso (>=1.3.2)
Recommends:
# Required for isohdpfx.bin (Ubuntu 14.04)
                    syslinux-common (>=3:4.05),
# Required for isohdpfx.bin (Ubuntu 15.04)
                    isolinux (>=3:6.03)

"Agda Baxisso" is the name for the month April in Afar language (language code aa).
It seems that for whatever reason your system tries to format the reply in that language.

What is the output of the command
locale

What is the output if temporarily switch locales settings with a command like
LANG=C ubuntu-support-status