Czech language spell check does not work

[crysman]

Czech language spell check does not work, although Czech Aspell language pack is installed. It is not even possible to select other language than "English" in the Spelling menu (F7) - see the attached screenshot.

I've also attached a test file.

Some debug info:
crysman@crysman-U36SD:~$ aspell dump dicts
cs
en
en-variant_0
en-variant_1
en-variant_2
en-w_accents
en-wo_accents
en_CA
en_CA-variant_0
en_CA-variant_1
en_CA-w_accents
en_CA-wo_accents
en_GB
en_GB-ise
en_GB-ise-w_accents
en_GB-ise-wo_accents
en_GB-ize
en_GB-ize-w_accents
en_GB-ize-wo_accents
en_GB-variant_0
en_GB-variant_1
en_GB-w_accents
en_GB-wo_accents
en_US
en_US-variant_0
en_US-variant_1
en_US-w_accents
en_US-wo_accents
es
crysman@crysman-U36SD:~$ aspell --version
@(#) International Ispell Version 3.1.20 (but really Aspell 0.60.7-20110707)
crysman@crysman-U36SD:~$ libreoffice --version
LibreOffice 4.2.4.2 420m0(Build:2)

crysman@crysman-U36SD:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: libreoffice-core 1:4.2.4-0ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: XFCE
Date: Mon Jul 7 02:00:58 2014
ExecutablePath: /usr/lib/libreoffice/program/soffice.bin
InstallationDate: Installed on 2013-10-26 (253 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016)
SourcePackage: libreoffice
UpgradeStatus: Upgraded to trusty on 2014-06-11 (25 days ago)

[crysman (crysman)]

(problem not present in 6.2.5.2 any more)