mixed language after upgrade to leap 15.1

I upgraded to leap 15.1 and I found plasma with mixed language like this english, italian [aiuto (centro documentazione)], russian:
https://paste.opensuse.org/43736865
how can I have the language only in english?
I attach this files related to language.
my /etc/locale.conf is this

LANG=en_US.UTF-8LC_TIME=en_DK.UTF-8

my user/.config/plasma-localerc is this

[Formats]
LANG=en_US.UTF-8
LC_MEASUREMENT=it_IT.UTF-8
LC_MONETARY=it_IT.UTF-8
LC_TIME=it_IT.UTF-8
useDetailed=true


[Translations]
LANGUAGE=en_US:it:ru:el



in Yast>languages>primary languages=English
my /etc/sysconfig/language is:




## Path:        System/Environment/Language
## Type:        string(ibus,fcitx,gcin,scim,scim-bridge,uim,kinput2,kinput2-canna,kinput2-wnn,nabi,wnn,atokx,xcin,none)
## Default:     ""
#
# A default input method to be used in X11 can be selected here.
# If this variable is set and a script with the same name
# as the value of this variable exists in the directory /etc/X11/xim.d/
# this script is sourced when X11 is started to start an input method.
#
# The special value "none" (/etc/X11/xim.d/none) means:
# Do not use any input method at all.
#
# For more details see the comments at the top of /etc/X11/xim.
#
INPUT_METHOD=""
## Path:	System/Environment/Language
## Description:	
## Type:	string(POSIX,ca_ES.ISO-8859-1,ca_ES.UTF-8,cs_CZ.ISO-8859-2,cs_CZ.UTF-8,da_DE@euro,da_DK.ISO-8859-1,da_DK.UTF-8,de_DE@euro,de_DE.ISO-8859-1,de_DE.UTF-8,el_GR.ISO-8859-7,el_GR.UTF-8,en_GB.ISO-8859-1,en_GB.UTF-8,en_IE@euro,en_IE.ISO-8859-1,en_US.ISO-8859-1,es_ES@euro,es_ES.ISO-8859-1,es_ES.UTF-8,fr_FR@euro,fr_FR.ISO-8859-1,fr_FR.UTF-8,gl_ES@euro,gl_ES.ISO-8859-1,gl_ES.utf-8,hr_HR.ISO-8859-2,hu_HU.ISO-8859-2,hu_HU.UTF-8,it_IT@euro,it_IT.ISO-8859-1,it_IT.UTF-8,ja_JP.eucJP,ja_JP.UTF-8,lt_LT.ISO-8859-13,lt_LT.UTF-8,nl_NL@euro,nl_NL.ISO-8859-1,nl_NL.UTF-8,ru_RU.ISO-8859-5,ru_RU.KOI8-R,ru_RU.UTF-8,sk_SK.ISO-8859-2,sk_SK.UTF-8,tr_TR.ISO-8859-9,tr_TR.UTF-8,ko_KR.eucKR,ko_KR.UTF-8,zh_TW.Big5,zh_TW.UTF-8,zh_CN.GB2312,zh_CN.UTF-8)
## Default:	""
## Config:      OpenOffice.org,groff,ispell,kde,kdm,profiles,susehelp,susewm,tetex,wdm
#
#
# Local users will get RC_LANG as their default language, i.e. the
# environment variable $LANG . $LANG is the default of all $LC_*-variables,
# as long as $LC_ALL is not set, which overrides all $LC_-variables.
# Root uses this variable only if ROOT_USES_LANG is set to "yes".
#
RC_LANG="en_US.UTF-8"


## Type:	string
## Default:	""
#
# This variable will override all LC-variables!!
# Again, ROOT_USES_LANG must be set to "yes", if an effect on the superuser
# account is desired.
#
RC_LC_ALL=""


## Type:	string
## Default:	""
#
# This defines the locale in which messages of programs and
# libraries with i18n-support should appear if a translated
# message catalog for the library or the program is installed.
# This also provides localized yes/no answers.
#
RC_LC_MESSAGES=""


## Type:	string
## Default:	""
#
# This defines the locale for character handling and classification.
# The libc uses this value in language dependent function calls, such
# as e.g. uppercase/lowercase mapping of foreign characters.
#
RC_LC_CTYPE=""


## Type:	string
## Default:	""
#
# This defines the locale for sorting strings and characters.
# It is used by the libc to obtain the alphabetical order of characters
# (e.g. for string comparisons).
#
RC_LC_COLLATE=""


## Type:	string
## Default:	""
#
# This defines the locale for date and time output formats.
# i.e.: 06/09/1999 vs. 09.06.1999
#
RC_LC_TIME=""


## Type:	string
## Default:	""
#
# This defines the locale for formatting and reading numbers.
# i.e.: 1,234.56 vs. 1.234,56
#
RC_LC_NUMERIC=""


## Type:	string
## Default:	""
#
# This defines the locale for formatting and reading money values.
#
RC_LC_MONETARY=""


## Type:	string
## Default:	""
#
# This defines the locale for format of paper.
#
RC_LC_PAPER=""


## Type:	string(ctype)
## Default:	ctype
#
# This defines if the user "root" should use the locale settings
# which are defined here.
# Value "ctype" means that root uses just LC_CTYPE. 
# Value "yes" means that root uses the full settings.. 
#
ROOT_USES_LANG="ctype"


## Type:        yesno
## Default:     no
#
# Workaround for missing forward of LANG and LC variables
# of e.g. ssh login connections.
#
AUTO_DETECT_UTF8="no"


## Type:        string
## Default:     ""
#
# List of installed language supports, use by YaST2
#
INSTALLED_LANGUAGES=""



I checked on a system that I had upgraded from 15.0 to 15.1. And I am not seeing any similar problems.

The files that you mention are all ones that you can change either as yourself (as a user) or with Yast.