German Language after migration from Windows IIS to Ubuntu 20.04LTS

Probably you need to add locale to your Ubuntu pc. Add locale to Ubuntu - Kvcodes .

Make sure

../lang/de_DE/LC_MESSAGES/de_DE-2.4.1-3.mo or similar exists and has read access and is equal to installed_languages.inc 'version' parameter (without the .mo extension.)

I run 3 Languages without a hitch - English, Arabic and German.. this is the content of my.. /lang/installed_languages.inc

$installed_languages = array (
  0 =>
  array (
    'code' => 'C',
    'name' => 'English',
    'encoding' => 'iso-8859-1',
  ),
  1 =>
  array (
    'name' => 'Arabic',
    'package' => 'ar_EG',
    'code' => 'ar_EG',
    'encoding' => 'utf-8',
    'version' => '2.4.1-3',
    'path' => 'lang/ar_EG',
    'rtl' => true,
  ),
  2 =>
  array (
    'name' => 'German',
    'package' => 'de_DE',
    'code' => 'de_DE',
    'encoding' => 'iso-8859-1',
    'version' => '2.4.1-3',
    'path' => 'lang/de_DE',
  ),
);

$dflt_lang = 'C';

Of course Languages are chosen from Preferences-->Language

Hi,
I'm not sure what you mean with that remark.
In the folder there are 2 files:
$dir
FrontAccounting_files/lang/de_DE/LC_MESSAGES$ dir
de_DE-2.4.1-3.mo  de_DE-2.4.1-3.po

But both have extensions, as you see above.

Several reboot didn't change anything.

Do you have any other idea?

This is the content of the installed_languages.inc:

$installed_languages = array (
  0 => 
  array (
    'code' => 'C',
    'name' => 'English',
    'encoding' => 'iso-8859-1',
  ),
  1 => 
  array (
    'name' => 'Swiss German',
    'package' => 'de_CH',
    'code' => 'de_CH',
    'encoding' => 'iso-8859-1',
    'version' => '2.4.1-3',
    'path' => 'lang/de_CH',
  ),
  2 => 
  array (
    'name' => 'German',
    'package' => 'de_DE',
    'code' => 'de_DE',
    'encoding' => 'iso-8859-1',
    'version' => '2.4.1-3',
    'path' => 'lang/de_DE',
  ),
  3 => 
  array (
    'name' => 'Tamil',
    'package' => 'ta_IN',
    'code' => 'ta_IN',
    'encoding' => 'utf-8',
    'version' => '2.4.2-3',
    'path' => 'lang/ta_IN',
  ),
);

$dflt_lang = 'de_DE';

Thx for the ideas.

Here some answers:

1) 201,8 kB
Content of *.po :  eg.
<code>
msgid "Description"
msgstr "Beschreibung"
</code>
-> Seems to be ok to me !

2) Very good idea. I have indeed the following:

[21-May-2021 22:25:09 Europe/Berlin] 0:gabriel:session.inc:315: Function get_magic_quotes_gpc() is deprecated
-> don't think that this is related

[03-May-2021 20:38:00 Europe/Berlin] 1 language code "de_DE", encoding "iso-8859-1" not supported by your system

-> I think that this is related...  but I have no idea, how this could be solved.
I understand the message like... there is a problem on the Ubuntu side.

Most probably what @kvvaradha suggested is going to work for you (not very sure though)..But how did your (local -a) listed that you already have the locale installed ? That I dont know.. unless you have another test system and you are mixing things up. Anyway ..just do as suggested and let us know. Good job..

Try
sudo dpkg-reconfigure locales

and choose the locales you need generating.

oops really strange. Check the error log again. I have a feeling its a folder/file permission now.

Just another idea; could this be related?

$db_connections = array (
  0 => 
  array (
    'name' => 'Test',
    'host' => '127.0.0.1',
    'port' => '3306',
    'dbname' => 'fa_test',
    'collation' => 'utf8_xx',
    'tbpref' => '0_',
    'dbuser' => 'root',

After quite a long time, I have found the solution to this:
It wasn't linked to FA, but to Apache under Ubuntu 20.04 LTS.

I had to uncomment this line of the envvars file located at etc/apache2/ envvars (line 28):

## Uncomment the following line to use the system default locale instead:
. /etc/default/locale

Restart Apache and TADA