Comment 0 for bug 1823778

Affected: 18.04.2 (did not try earlier versions of 18.04 series)
Not affected: 16.04 - any version (UI was different)

Preparation steps:
1. open gnome control center
2. open Region & Language
3. open Manage installed languages
4. open Install/Remove languages
5. select Serbian, click Apply
6. provide credentials for sudo installation
7. wait for installation to complete
8. click Close

What is wrong:
1. open gnome control center
2. open Region & Language
3. click Language selection
4. Serbian is not visible

Notes:
- Serbian is visible for the Formats selection
- Any other language I thought of: (Macedonian, Croatian, Bosnian, Russion...) simple work.

Here is some dpkg output on installaed packages matching sr (Serbian) or hr (Croatian).

ii firefox-locale-sr 66.0.2+build1-0ubuntu0.18.04.1 amd64 Serbian language pack for Firefox
ii gnome-getting-started-docs-sr 3.28.2-0ubuntu0.1 all Help a new user get started in GNOME (Serbian)
ii gnome-user-docs-sr 3.28.2+git20180715-0ubuntu0.1 all GNOME user's guide (Serbian)
ii hunspell-sr 1:6.0.3-3 all Serbian dictionary for hunspell
ii hyphen-sr 1:6.0.3-3 all Serbian hyphenation patterns
ii language-pack-gnome-sr 1:18.04+20180712 all GNOME translation updates for language Serbian
ii language-pack-gnome-sr-base 1:18.04+20180712 all GNOME translations for language Serbian
ii language-pack-sr 1:18.04+20180712 all translation updates for language Serbian
ii language-pack-sr-base 1:18.04+20180712 all translations for language Serbian
ii libreoffice-l10n-sr 1:6.0.7-0ubuntu0.18.04.2 all office productivity suite -- Serbian language package
ii thunderbird-locale-sr 1:60.6.1+build2-0ubuntu0.18.04.1 amd64 Serbian language pack for Thunderbird
nebojsa@momcilo-desktop:~$ dpkg -l | grep -e "-hr"
rc language-pack-gnome-hr-base 1:18.04+20180712 all GNOME translations for language Croatian
rc language-pack-hr-base 1:18.04+20180712 all translations for language Croatian

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-control-center 1:3.28.2-0ubuntu0.18.04.2
ProcVersionSignature: Ubuntu 4.18.0-17.18~18.04.1-generic 4.18.20
Uname: Linux 4.18.0-17-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 8 20:10:54 2019
InstallationDate: Installed on 2019-04-06 (2 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)