Description of problem:
I hit this error, but with LANG=C it works.

# echo $LANG
es_ES.utf8


# dnf groupinstall "Basic Desktop"
Last metadata expiration check performed 2:17:38 ago on Thu May 21 17:35:55 2015.
Traceback (most recent call last):
  File "/usr/bin/dnf", line 36, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 185, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 84, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 134, in _main
    cli.run()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 1077, in run
    return self.command.run(self.base.extcmds)
  File "/usr/lib/python2.7/site-packages/dnf/cli/commands/group.py", line 385, in run
    return self.base.env_group_install(patterns, types)
  File "/usr/lib/python2.7/site-packages/dnf/base.py", line 1253, in env_group_install
    res.groups, types)
  File "/usr/lib/python2.7/site-packages/dnf/comps.py", line 88, in install_or_skip
    logger.warning("%s, %s", str(e)[:-1], _("skipping."))
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe1' in position 19: ordinal not in range(128)

# LANG=C dnf groupinstall "Basic Desktop"
Last metadata expiration check performed 2:18:05 ago on Thu May 21 17:35:55 2015.
Group 'Basic Desktop' is already installed, skipping.
Error: package PackageKit-gstreamer-plugin-1.0.6-3.fc22.armv7hl requires PackageKit-glib(armv7hl-32) = 1.0.6-3.fc22, but none of the providers can be installed.
package lightdm-1.10.4-1.fc22.armv7hl requires dbus-x11, but none of the providers can be installed.
package initial-setup-gui-0.3.31-1.fc22.armv7hl requires anaconda-gui >= 21.46, but none of the providers can be installed.
package plymouth-system-theme-0.8.9-7.2013.08.14.fc22.armv7hl requires plymouth(system-theme) = 0.8.9-7.2013.08.14.fc22, but none of the providers can be installed.
package abrt-cli-2.5.1-2.fc22.armv7hl requires abrt-addon-python, but none of the providers can be installed


Version-Release number of selected component (if applicable):
python-dnf-plugins-extras-common-0.0.7-1.fc22.noarch
dnf-conf-1.0.0-1.fc22.noarch
dnf-yum-1.0.0-1.fc22.noarch
python-dnf-plugins-core-0.1.8-1.fc22.noarch
python-dnf-1.0.0-1.fc22.noarch
python-dnf-plugins-extras-migrate-0.0.7-1.fc22.noarch
dnf-plugins-core-0.1.8-1.fc22.noarch
dnf-1.0.0-1.fc22.noarch
yum-utils-1.1.31-505.fc22.noarch
yum-metadata-parser-1.1.4-14.fc22.armv7hl
yum-3.4.3-505.fc22.noarch