diff --git a/config/services.yaml b/config/services.yaml
index a16b2f9b..8e1c2af5 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -81,6 +81,11 @@ services:
         arguments:
             $renderer: !tagged widget.renderer
 
+    App\Utils\Translator:
+        decorates: translator
+        arguments:
+            $localDomains: '%kimai.i18n_domains%'
+
     # ================================================================================
     # DATABASE
     # ================================================================================
diff --git a/src/DependencyInjection/AppExtension.php b/src/DependencyInjection/AppExtension.php
index 757af2af..7777635b 100644
--- a/src/DependencyInjection/AppExtension.php
+++ b/src/DependencyInjection/AppExtension.php
@@ -62,6 +62,16 @@ class AppExtension extends Extension
         $container->setParameter('kimai.timesheet.rounding', $config['timesheet']['rounding']);
 
         $this->setLdapParameter($config['ldap'], $container);
+
+        // translation files, which can overwrite the default kimai translations
+        $localTranslations = [];
+        if (null !== $config['theme']['branding']['translation']) {
+            $localTranslations[] = $config['theme']['branding']['translation'];
+        }
+        if (null !== $config['industry']['translation']) {
+            $localTranslations[] = $config['industry']['translation'];
+        }
+        $container->setParameter('kimai.i18n_domains', $localTranslations);
     }
 
     protected function setLdapParameter(array $config, ContainerBuilder $container)
diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index 5907f912..423ec761 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -58,6 +58,7 @@ class Configuration implements ConfigurationInterface
                 ->append($this->getLanguagesNode())
                 ->append($this->getCalendarNode())
                 ->append($this->getThemeNode())
+                ->append($this->getIndustryNode())
                 ->append($this->getDashboardNode())
                 ->append($this->getWidgetsNode())
                 ->append($this->getDefaultsNode())
@@ -344,6 +345,9 @@ class Configuration implements ConfigurationInterface
                         ->scalarNode('title')
                             ->defaultNull()
                         ->end()
+                        ->scalarNode('translation')
+                            ->defaultNull()
+                        ->end()
                     ->end()
                 ->end()
                 ->integerNode('autocomplete_chars')
@@ -355,6 +359,22 @@ class Configuration implements ConfigurationInterface
         return $node;
     }
 
+    protected function getIndustryNode()
+    {
+        $builder = new TreeBuilder('industry');
+        /** @var ArrayNodeDefinition $rootNode */
+        $node = $builder->getRootNode();
+
+        $node
+            ->addDefaultsIfNotSet()
+            ->children()
+                ->scalarNode('translation')->defaultNull()->end()
+            ->end()
+        ;
+
+        return $node;
+    }
+
     protected function getUserNode()
     {
         $builder = new TreeBuilder('user');
diff --git a/src/Entity/User.php b/src/Entity/User.php
index 68c63bae..60d644bd 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -340,11 +340,20 @@ class User extends BaseUser implements UserInterface
         return $this->hasRole(static::ROLE_ADMIN);
     }
 
+    public function getDisplayName(): ?string
+    {
+        if (!empty($this->getAlias())) {
+            return $this->getAlias();
+        }
+
+        return $this->getUsername();
+    }
+
     /**
      * @return string
      */
     public function __toString()
     {
-        return $this->getAlias() ?: $this->getUsername();
+        return $this->getDisplayName();
     }
 }
diff --git a/src/Form/Type/UserType.php b/src/Form/Type/UserType.php
index 39569513..e3cffb4b 100644
--- a/src/Form/Type/UserType.php
+++ b/src/Form/Type/UserType.php
@@ -31,11 +31,7 @@ class UserType extends AbstractType
             'class' => User::class,
             'label' => 'label.user',
             'choice_label' => function (User $user) {
-                if (!empty($user->getAlias())) {
-                    return $user->getAlias() . ' (' . $user->getUsername() . ')';
-                }
-
-                return $user->getUsername();
+                return $user->getDisplayName();
             },
         ]);
 
diff --git a/src/Utils/Translator.php b/src/Utils/Translator.php
new file mode 100644
index 00000000..81d27111
--- /dev/null
+++ b/src/Utils/Translator.php
@@ -0,0 +1,128 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Utils;
+
+use Symfony\Bundle\FrameworkBundle\Translation\Translator as BaseTranslator;
+use Symfony\Component\Translation\Exception\InvalidArgumentException;
+use Symfony\Component\Translation\MessageCatalogueInterface;
+use Symfony\Component\Translation\TranslatorBagInterface;
+use Symfony\Component\Translation\TranslatorInterface as LegacyTranslatorInterface;
+use Symfony\Contracts\Translation\LocaleAwareInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
+/**
+ * Should be:
+ * class Translator implements TranslatorInterface, TranslatorBagInterface, LocaleAwareInterface
+ *
+ * But this is not compatible with PagerFanta yet.
+ */
+class Translator implements LegacyTranslatorInterface, TranslatorInterface, TranslatorBagInterface
+{
+    /**
+     * @var BaseTranslator
+     */
+    private $translator;
+    /**
+     * @var array
+     */
+    private $localDomains = [];
+
+    public function __construct(BaseTranslator $translator, array $localDomains = [])
+    {
+        $this->translator = $translator;
+        $this->localDomains = $localDomains;
+    }
+
+    public function trans($id, array $parameters = [], $domain = 'messages', $locale = null)
+    {
+        if (null === $domain) {
+            $domain = 'messages';
+        }
+
+        foreach ($this->localDomains as $localDomain) {
+            if (false !== $this->hasLocalOverwrite($id, $localDomain, $locale)) {
+                $domain = $localDomain;
+                break;
+            }
+        }
+
+        return $this->translator->trans($id, $parameters, $domain, $locale);
+    }
+
+    protected function hasLocalOverwrite($id, $domain, $locale = null): bool
+    {
+        $found = false;
+
+        $catalogue = $this->getCatalogue($locale);
+        while (false === ($found = $catalogue->defines($id, $domain))) {
+            if ($cat = $catalogue->getFallbackCatalogue()) {
+                $catalogue = $cat;
+            } else {
+                break;
+            }
+        }
+
+        return $found;
+    }
+
+    /**
+     * Gets the catalogue by locale.
+     *
+     * @param string|null $locale The locale or null to use the default
+     *
+     * @return MessageCatalogueInterface
+     *
+     * @throws InvalidArgumentException If the locale contains invalid characters
+     */
+    public function getCatalogue($locale = null)
+    {
+        return $this->translator->getCatalogue($locale);
+    }
+
+    /**
+     * Sets the current locale.
+     *
+     * @param string $locale The locale
+     *
+     * @throws \InvalidArgumentException If the locale contains invalid characters
+     */
+    public function setLocale($locale)
+    {
+        $this->translator->setLocale($locale);
+    }
+
+    /**
+     * Returns the current locale.
+     *
+     * @return string The locale
+     */
+    public function getLocale()
+    {
+        return $this->translator->getLocale();
+    }
+
+    /**
+     * Translates the given choice message by choosing a translation according to a number.
+     *
+     * @param string $id The message id (may also be an object that can be cast to string)
+     * @param int $number The number to use to find the index of the message
+     * @param array $parameters An array of parameters for the message
+     * @param string|null $domain The domain for the message or null to use the default
+     * @param string|null $locale The locale or null to use the default
+     *
+     * @return string The translated string
+     *
+     * @throws InvalidArgumentException If the locale contains invalid characters
+     */
+    public function transChoice($id, $number, array $parameters = [], $domain = null, $locale = null)
+    {
+        return $this->translator->transChoice($id, $number, $parameters, $domain, $locale);
+    }
+}
diff --git a/templates/macros/widgets.html.twig b/templates/macros/widgets.html.twig
index 902f6290..2493cc18 100644
--- a/templates/macros/widgets.html.twig
+++ b/templates/macros/widgets.html.twig
@@ -50,12 +50,12 @@
 {% endmacro %}
 
 {% macro username(user) %}
-    {{ user.alias|default(user.username) }}
+    {{- user.displayName -}}
 {% endmacro %}
 
 {% macro label_user(user) %}
     {% import _self as macro %}
-    {{ macro.label(macro.username(user), 'primary') }}
+    {{ macro.label(user.displayName, 'primary') }}
 {% endmacro %}
 
 {% macro label_activity(activity, url) %}
diff --git a/tests/DependencyInjection/AppExtensionTest.php b/tests/DependencyInjection/AppExtensionTest.php
index 3b0c6fd8..2f548acc 100644
--- a/tests/DependencyInjection/AppExtensionTest.php
+++ b/tests/DependencyInjection/AppExtensionTest.php
@@ -98,7 +98,6 @@ class AppExtensionTest extends TestCase
                     'currency' => 'EUR',
                 ]
             ],
-
             'kimai.theme' => [
                 'active_warning' => 3,
                 'box_color' => 'green',
@@ -115,18 +114,17 @@ class AppExtensionTest extends TestCase
                     'mini' => null,
                     'company' => null,
                     'title' => null,
+                    'translation' => null,
                 ],
                 'auto_reload_datatable' => false,
                 'autocomplete_chars' => 3,
             ],
             'kimai.theme.select_type' => null,
             'kimai.theme.show_about' => true,
-
             'kimai.fosuser' => [
                 'registration' => true,
                 'password_reset' => true,
             ],
-
             'kimai.timesheet' => [
                 'mode' => 'default',
                 'markdown_content' => false,
@@ -174,6 +172,7 @@ class AppExtensionTest extends TestCase
                 'ROLE_ADMIN' => [],
                 'ROLE_SUPER_ADMIN' => [],
             ],
+            'kimai.i18n_domains' => []
         ];
 
         // nasty parameter, should be removed!!!
@@ -322,6 +321,34 @@ class AppExtensionTest extends TestCase
         $this->assertEquals('(&(objectClass=inetOrgPerson))', $ldapConfig['user']['filter']);
     }
 
+    public function testTranslationOverwritesEmpty()
+    {
+        $minConfig = $this->getMinConfig();
+        $this->extension->load($minConfig, $container = $this->getContainer());
+
+        $config = $container->getParameter('kimai.i18n_domains');
+        $this->assertEquals([], $config);
+    }
+
+    public function testTranslationOverwrites()
+    {
+        $minConfig = $this->getMinConfig();
+        $minConfig['kimai']['industry'] = [
+            'translation' => 'xxxx',
+        ];
+        $minConfig['kimai']['theme'] = [
+            'branding' => [
+                'translation' => 'yyyy',
+            ]
+        ];
+
+        $this->extension->load($minConfig, $container = $this->getContainer());
+
+        $config = $container->getParameter('kimai.i18n_domains');
+        // oder is important, theme/installation specific translations win
+        $this->assertEquals(['yyyy', 'xxxx'], $config);
+    }
+
     /**
      * @expectedException \PHPUnit\Framework\Error\Notice
      * @expectedExceptionMessage Found invalid "kimai" configuration: The child node "data_dir" at path "kimai" must be configured.
diff --git a/tests/DependencyInjection/ConfigurationTest.php b/tests/DependencyInjection/ConfigurationTest.php
index b28ff9f2..1dfa7b24 100644
--- a/tests/DependencyInjection/ConfigurationTest.php
+++ b/tests/DependencyInjection/ConfigurationTest.php
@@ -219,4 +219,138 @@ class ConfigurationTest extends TestCase
         ];
         self::assertEquals($expected, $finalizedConfig['ldap']);
     }
+
+    public function testFullDefaultConfig()
+    {
+        $fullDefaultConfig = [
+            'data_dir' => '/tmp/',
+            'plugin_dir' => '/tmp/',
+            'timesheet' => [
+                'default_begin' => 'now',
+                'mode' => 'default',
+                'markdown_content' => false,
+                'rounding' => [],
+                'rates' => [],
+                'active_entries' => [
+                    'soft_limit' => 1,
+                    'hard_limit' => 1,
+                ],
+                'rules' => [
+                    'allow_future_times' => true,
+                ],
+            ],
+            'user' => [
+                'registration' => true,
+                'password_reset' => true,
+            ],
+            'invoice' => [
+                'documents' => [
+                    0 => 'var/invoices/',
+                    1 => 'templates/invoice/renderer/',
+                ],
+            ],
+            'languages' => [],
+            'calendar' => [
+                'week_numbers' => true,
+                'day_limit' => 4,
+                'slot_duration' => '00:30:00',
+                'businessHours' => [
+                    'days' => [
+                        0 => 1,
+                        1 => 2,
+                        2 => 3,
+                        3 => 4,
+                        4 => 5,
+                    ],
+                    'begin' => '08:00',
+                    'end' => '20:00',
+                ],
+                'visibleHours' => [
+                    'begin' => '00:00',
+                    'end' => '23:59',
+                ],
+                'google' => [
+                    'api_key' => null,
+                    'sources' => [
+                    ],
+                ],
+                'weekends' => true,
+            ],
+            'theme' => [
+                'active_warning' => 3,
+                'box_color' => 'green',
+                'select_type' => null,
+                'auto_reload_datatable' => false,
+                'show_about' => true,
+                'chart' => [
+                    'background_color' => 'rgba(0,115,183,0.7)',
+                    'border_color' => '#3b8bba',
+                    'grid_color' => 'rgba(0,0,0,.05)',
+                    'height' => '200',
+                ],
+                'branding' => [
+                    'logo' => null,
+                    'mini' => null,
+                    'company' => null,
+                    'title' => null,
+                    'translation' => null,
+                ],
+                'autocomplete_chars' => 3,
+            ],
+            'industry' => [
+                'translation' => null,
+            ],
+            'dashboard' => [],
+            'widgets' => [],
+            'defaults' => [
+                'customer' => [
+                    'timezone' => null,
+                    'country' => 'DE',
+                    'currency' => 'EUR',
+                ],
+                'user' => [
+                    'timezone' => null,
+                    'language' => 'en',
+                    'theme' => null,
+                    'currency' => 'EUR',
+                ],
+            ],
+            'permissions' => [
+                'sets' => [],
+                'maps' => [],
+                'roles' => [
+                    'ROLE_USER' => [],
+                    'ROLE_TEAMLEAD' => [],
+                    'ROLE_ADMIN' => [],
+                    'ROLE_SUPER_ADMIN' => [],
+                ],
+            ],
+            'ldap' => [
+                'connection' => [
+                    'host' => null,
+                    'port' => 389,
+                    'useStartTls' => false,
+                    'useSsl' => false,
+                    'bindRequiresDn' => true,
+                    'accountFilterFormat' => null,
+                ],
+                'user' => [
+                    'baseDn' => null,
+                    'filter' => '',
+                    'attributesFilter' => '(objectClass=*)',
+                    'usernameAttribute' => 'uid',
+                    'attributes' => [],
+                ],
+                'role' => [
+                    'baseDn' => null,
+                    'usernameAttribute' => 'dn',
+                    'nameAttribute' => 'cn',
+                    'userDnAttribute' => 'member',
+                    'groups' => [],
+                ],
+            ]
+        ];
+
+        $this->assertConfig($this->getMinConfig(), $fullDefaultConfig);
+    }
 }
diff --git a/tests/Entity/UserTest.php b/tests/Entity/UserTest.php
index 3f1a1517..3e3348c4 100644
--- a/tests/Entity/UserTest.php
+++ b/tests/Entity/UserTest.php
@@ -25,6 +25,7 @@ class UserTest extends TestCase
         $user = new User();
         $this->assertInstanceOf(ArrayCollection::class, $user->getPreferences());
         $this->assertNull($user->getTitle());
+        $this->assertNull($user->getDisplayName());
         $this->assertNull($user->getAvatar());
         $this->assertNull($user->getAlias());
         $this->assertNull($user->getId());
@@ -73,17 +74,20 @@ class UserTest extends TestCase
         $this->assertEquals('I like rain', $user->getPreferenceValue('test2'));
     }
 
-    public function testToString()
+    public function testDisplayName()
     {
         $user = new User();
 
         $user->setUsername('bar');
-        $this->assertEquals('bar', (string) $user);
+        $this->assertEquals('bar', $user->getDisplayName());
         $this->assertEquals('bar', $user->getUsername());
+        $this->assertEquals('bar', (string) $user);
 
         $user->setAlias('foo');
-        $this->assertEquals('foo', (string) $user);
         $this->assertEquals('foo', $user->getAlias());
+        $this->assertEquals('bar', $user->getUsername());
+        $this->assertEquals('foo', $user->getDisplayName());
+        $this->assertEquals('foo', (string) $user);
     }
 
     public function testGetLocale()
diff --git a/translations/messages.de.xliff b/translations/messages.de.xliff
index 8b5c3077..4a104416 100644
--- a/translations/messages.de.xliff
+++ b/translations/messages.de.xliff
@@ -190,7 +190,7 @@
             </trans-unit>
             <trans-unit id="label.username">
                 <source>label.username</source>
-                <target>Benutzername</target>
+                <target>Benutzer</target>
             </trans-unit>
             <trans-unit id="label.description">
                 <source>label.description</source>
diff --git a/translations/messages.en.xliff b/translations/messages.en.xliff
index 94f6d3fe..1523cca3 100644
--- a/translations/messages.en.xliff
+++ b/translations/messages.en.xliff
@@ -190,7 +190,7 @@
             </trans-unit>
             <trans-unit id="label.username">
                 <source>label.username</source>
-                <target>Username</target>
+                <target>User</target>
             </trans-unit>
             <trans-unit id="label.description">
                 <source>label.description</source>