diff --git a/manual-install/update-yaml.sh b/manual-install/update-yaml.sh
index 1de5f038..fc8c370d 100644
--- a/manual-install/update-yaml.sh
+++ b/manual-install/update-yaml.sh
@@ -59,6 +59,7 @@ done
 sed -i 's|_ENABLED=|_ENABLED=no          # Setting this to "yes" enables the option in Nextcloud automatically.|' sample.conf
 sed -i 's|TALK_ENABLED=no|TALK_ENABLED=yes|' sample.conf
 sed -i 's|COLLABORA_ENABLED=no|COLLABORA_ENABLED=yes|' sample.conf
+sed -i 's|COLLABORA_DICTIONARIES=|COLLABORA_DICTIONARIES=de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru        # You can change this in order to enable other dictionaries for collabora|' sample.conf
 sed -i 's|NEXTCLOUD_DATADIR=|NEXTCLOUD_DATADIR=nextcloud_aio_nextcloud_data          # You can change this to e.g. "/mnt/ncdata" to map it to a location on your host. It needs to be adjusted before the first startup and never afterwards!|' sample.conf
 sed -i 's|NEXTCLOUD_MOUNT=|NEXTCLOUD_MOUNT=/mnt/          # This allows the Nextcloud container to access directories on the host. It must never be equal to the value of NEXTCLOUD_DATADIR!|' sample.conf
 sed -i 's|DAILY_BACKUP_RUNNING=|DAILY_BACKUP_RUNNING=no          # When setting to yes, it will automatically update all installed Nextcloud apps upon container startup.|' sample.conf
diff --git a/php/containers.json b/php/containers.json
index 4b842bc4..39c2fca1 100644
--- a/php/containers.json
+++ b/php/containers.json
@@ -178,6 +178,7 @@
       "environmentVariables": [
         "aliasgroup1=https://%NC_DOMAIN%:443",
         "extra_params=--o:ssl.enable=false --o:ssl.termination=true --o:logging.level=warning",
+        "dictionaries=%COLLABORA_DICTIONARIES%",
         "TZ=%TIMEZONE%"
       ],
       "volumes": [],
diff --git a/php/public/index.php b/php/public/index.php
index e553e256..abc1d17f 100644
--- a/php/public/index.php
+++ b/php/public/index.php
@@ -99,6 +99,7 @@ $app->get('/containers', function ($request, $response, $args) use ($container)
         'timezone' => $configurationManager->GetTimezone(),
         'skip_domain_validation' => $configurationManager->shouldDomainValidationBeSkipped(),
         'talk_port' => $configurationManager->GetTalkPort(),
+        'collabora_dictionaries' =>  $configurationManager->GetCollaboraDictionaries(),
     ]);
 })->setName('profile');
 $app->get('/login', function ($request, $response, $args) use ($container) {
diff --git a/php/src/Controller/ConfigurationController.php b/php/src/Controller/ConfigurationController.php
index f19e33ab..cf8c5031 100644
--- a/php/src/Controller/ConfigurationController.php
+++ b/php/src/Controller/ConfigurationController.php
@@ -87,6 +87,15 @@ class ConfigurationController
                 }
             }
 
+            if (isset($request->getParsedBody()['delete_collabora_dictionaries'])) {
+                $this->configurationManager->DeleteCollaboraDictionaries();
+            }
+
+            if (isset($request->getParsedBody()['collabora_dictionaries'])) {
+                $collaboraDictionaries = $request->getParsedBody()['collabora_dictionaries'] ?? '';
+                $this->configurationManager->SetCollaboraDictionaries($collaboraDictionaries);
+            }
+
             return $response->withStatus(201)->withHeader('Location', '/');
         } catch (InvalidSettingConfigurationException $ex) {
             $response->getBody()->write($ex->getMessage());
diff --git a/php/src/Data/ConfigurationManager.php b/php/src/Data/ConfigurationManager.php
index ad4e4060..5ce5051a 100644
--- a/php/src/Data/ConfigurationManager.php
+++ b/php/src/Data/ConfigurationManager.php
@@ -568,4 +568,36 @@ class ConfigurationManager
         }
         return false;
     }
+
+    public function GetCollaboraDictionaries() : string {
+        $config = $this->GetConfig();
+        if(!isset($config['collabora_dictionaries'])) {
+            $config['collabora_dictionaries'] = '';
+        }
+
+        return $config['collabora_dictionaries'];
+    }
+
+    /**
+     * @throws InvalidSettingConfigurationException
+     */
+    public function SetCollaboraDictionaries(string $CollaboraDictionaries) : void {
+        if ($CollaboraDictionaries === "") {
+            throw new InvalidSettingConfigurationException("The dictionaries must not be empty!");
+        }
+
+        if (!preg_match("#^[a-zA-Z_ ]+$#", $CollaboraDictionaries)) {
+            throw new InvalidSettingConfigurationException("The entered dictionaries do not seem to be a valid!");
+        }
+
+        $config = $this->GetConfig();
+        $config['collabora_dictionaries'] = $CollaboraDictionaries;
+        $this->WriteConfig($config);
+    }
+
+    public function DeleteCollaboraDictionaries() : void {
+        $config = $this->GetConfig();
+        $config['collabora_dictionaries'] = '';
+        $this->WriteConfig($config);
+    }
 }
diff --git a/php/src/Docker/DockerActionManager.php b/php/src/Docker/DockerActionManager.php
index ac4231ea..cf521a49 100644
--- a/php/src/Docker/DockerActionManager.php
+++ b/php/src/Docker/DockerActionManager.php
@@ -292,6 +292,12 @@ class DockerActionManager
                     } else {
                         $replacements[1] = $this->configurationManager->GetTimezone();
                     }
+                } elseif ($out[1] === 'COLLABORA_DICTIONARIES') {
+                    if ($this->configurationManager->GetCollaboraDictionaries() === '') {
+                        $replacements[1] = 'de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru';
+                    } else {
+                        $replacements[1] = $this->configurationManager->GetCollaboraDictionaries();
+                    }
                 } else {
                     $replacements[1] = $this->configurationManager->GetSecret($out[1]);
                 }
diff --git a/php/templates/containers.twig b/php/templates/containers.twig
index 02cc854c..3fe75ff3 100644
--- a/php/templates/containers.twig
+++ b/php/templates/containers.twig
@@ -459,6 +459,29 @@
                         <script type="text/javascript" src="disable-collabora.js"></script>
                     {% endif %}
 
+                    {% if is_collabora_enabled == true and isAnyRunning == false and was_start_button_clicked == true %}
+                        <h3>Collabora dictionaries</h3>
+
+                        {% if collabora_dictionaries == "" %}
+                            In order to get the correct dictionaries in Collabora, you may configure the dictionaries below:<br><br>
+                            <form method="POST" action="/api/configuration" class="xhr">
+                                <input type="text" name="collabora_dictionaries" placeholder="de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru" />
+                                <input type="hidden" name="{{csrf.keys.name}}" value="{{csrf.name}}">
+                                <input type="hidden" name="{{csrf.keys.value}}" value="{{csrf.value}}">
+                                <input class="button" type="submit" value="Submit" />
+                            </form>
+                            You need to make sure that the dictionaries that you enter are valid. An example is <b>de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru</b>.<br><br>
+                        {% else %}
+                            The dictionaries for Collabora are currently set to <b>{{ collabora_dictionaries }}</b>. You can reset them again by clicking on the button below.<br><br/>
+                            <form method="POST" action="/api/configuration" class="xhr">
+                                <input type="hidden" name="delete_collabora_dictionaries" value="yes"/>
+                                <input type="hidden" name="{{csrf.keys.name}}" value="{{csrf.name}}">
+                                <input type="hidden" name="{{csrf.keys.value}}" value="{{csrf.value}}">
+                                <input class="button" type="submit" value="Reset collabora dictionaries" />
+                            </form>
+                        {% endif %}
+                    {% endif %}
+
                     <h2>Timezone change</h2>
                     {% if isAnyRunning == true %}
                         {% if timezone != "" %}
diff --git a/tests/QA/050-optional-addons.md b/tests/QA/050-optional-addons.md
index 909b9552..339892da 100644
--- a/tests/QA/050-optional-addons.md
+++ b/tests/QA/050-optional-addons.md
@@ -8,5 +8,6 @@
     - [ ] Collabora by trying to open a .docx or .odt file in Nextcloud
     - [ ] Nextcloud Talk by opening the Talk app in Nextcloud, creating a new chat and trying to join a call in this chat. Also verifying in the settings that the HPB and turn server work.
     - [ ] Onlyoffice by trying to open a .docx file in Nextcloud
+- [ ] When Collabora is enabled, it should show below the Optional Addons section a section where you can change the dictionaries for collabora. `de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru` should be a valid setting. E.g. `de.De` not. If already set, it should show a button that allows to remove the setting again.
 
 You can now continue with [060-environmental-variables.md](./060-environmental-variables.md)
\ No newline at end of file