do-release-upgrade in localized environment does not accept english input

Hi,

I was running do-release-upgrade tool in an environment like:
LANG=ru_UA.UTF-8
LANGUAGE=ru:en:uk:en
LC_CTYPE="ru_UA.UTF-8"
LC_NUMERIC=ru_UA.UTF-8
LC_TIME=ru_UA.UTF-8
LC_COLLATE="ru_UA.UTF-8"
LC_MONETARY=ru_UA.UTF-8
LC_MESSAGES="ru_UA.UTF-8"
LC_PAPER=ru_UA.UTF-8
LC_NAME=ru_UA.UTF-8
LC_ADDRESS=ru_UA.UTF-8
LC_TELEPHONE=ru_UA.UTF-8
LC_MEASUREMENT=ru_UA.UTF-8
LC_IDENTIFICATION=ru_UA.UTF-8
LC_ALL=

And during upgrade process I was not able to change my keyboard layout other that to english (US).
But the tool had asked me questions in russian and expected that I will input my answers in russian:

 66 пакетов будут удалены.

 Продолжить [дН] Подробности [п]

I tried to input 'y' as for 'yes' but no luck. The workaround is to copy-paste 'д' letter from terminal emulator. But when you are using tty it can be a problem.

So please, can you make `do-release-upgrade` tool accept english input despite the locale?

I am using:
Description: Ubuntu Utopic Unicorn (development branch)
Release: 14.10

ubuntu-release-upgrader-core:
  Installed: 1:14.10.7
  Candidate: 1:14.10.7
  Version table:
 *** 1:14.10.7 0
        500 http://ua.archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages
        100 /var/lib/dpkg/status

I was upgrading from 14.04 LTS to 14.10 Beta 1

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: ubuntu-release-upgrader-core 1:14.10.7
ProcVersionSignature: Ubuntu 3.13.0-19.40-generic 3.13.6
Uname: Linux 3.13.0-19-generic x86_64
ApportVersion: 2.14.7-0ubuntu2
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Sun Sep 14 12:04:12 2014
InstallationDate: Installed on 2014-03-19 (178 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140121.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to utopic on 2014-09-14 (0 days ago)