diff --git a/.env.sample b/.env.sample
index 28ae38e..26c2654 100644
--- a/.env.sample
+++ b/.env.sample
@@ -5,3 +5,4 @@ NEXTCLOUD_DOMAIN=nextcloud.example.com
 ADMIN_USERNAME=admin
 SECRET_ADMIN_PASSWORD_VERSION=v1
 FRAME_ANCESTORS=
+DICTIONARIES=de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT
\ No newline at end of file
diff --git a/README.md b/README.md
index 9de9cc9..213a0ca 100644
--- a/README.md
+++ b/README.md
@@ -18,14 +18,22 @@
 
 1. Set up Docker Swarm and [`abra`](https://git.autonomic.zone/coop-cloud/abra)
 1. Deploy [`coop-cloud/traefik`](https://git.autonomic.zone/coop-cloud/traefik)
+1. `abra app new collabora` to install collabora.
 1. `abra app config YOURAPPDOMAIN` - be sure to change `$DOMAIN` to something that resolves to
    your Docker swarm box
 1. `abra app deploy YOURAPPDOMAIN`
+1. In nextcloud, go to Admin->Office, select "Use your own server" and enter only the DOMAIN (including https://) in "URL (and Port) of Collabora Online-server".
 
 Admin Interface:
 
 `https://YOURAPPDOMAIN/browser/dist/admin/admin.html`
 
+## Languages for spell checking
+
+To change default languages for spell checking, add or remove language-codes (and optionally country code) from the DICTIONARIES-list when configuring your app. Consult list of [language codes](https://en.wikipedia.org/wiki/List_of_ISO_639_language_codes) and [country codes](https://en.wikipedia.org/wiki/List_of_ISO_3166_country_codes). For example:
+
+`DICTIONARIES=de_DE en_GB en_US es_ES fr_FR da_DK`
+
 ## Acknowledgements
 
 Config'd with thanks to [the people behind this article](https://geek-cookbook.funkypenguin.co.nz/recipes/collabora-online/).
diff --git a/compose.yml b/compose.yml
index 9e66d7d..2a1cb6f 100644
--- a/compose.yml
+++ b/compose.yml
@@ -56,6 +56,7 @@ services:
       - DONT_GEN_SSL_CERT=true
       - NEXTCLOUD_DOMAIN=${NEXTCLOUD_DOMAIN}
       - FRAME_ANCESTORS
+      - DICTIONARIES
     networks:
       - internal
     deploy:
diff --git a/coolwsd.xml.tmpl b/coolwsd.xml.tmpl
index 3f5fad0..609d256 100644
--- a/coolwsd.xml.tmpl
+++ b/coolwsd.xml.tmpl
@@ -7,7 +7,8 @@
     <!-- Note: 'default' attributes are used to document a setting's default value as well as to use as fallback. -->
     <!-- Note: When adding a new entry, a default must be set in WSD in case the entry is missing upon deployment. -->
 
-    <allowed_languages desc="List of supported languages of Writing Aids (spell checker, grammar checker, thesaurus, hyphenation) on this instance. Allowing too many has negative effect on startup performance." default="de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru">de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru</allowed_languages>
+    <allowed_languages desc="List of supported languages of Writing Aids (spell checker, grammar checker, thesaurus, hyphenation) on this instance. Allowing too many has negative effect on startup performance." default="{{ env "DICTIONARIES" }}">{{ env "DICTIONARIES" }}</allowed_languages>
+
 
     <sys_template_path desc="Path to a template tree with shared libraries etc to be used as source for chroot jails for child processes." type="path" relative="true" default="systemplate"></sys_template_path>
     <child_root_path desc="Path to the directory under which the chroot jails for the child processes will be created. Should be on the same file system as systemplate and lotemplate. Must be an empty directory." type="path" relative="true" default="jails"></child_root_path>