diff --git a/backend/news/55.internal b/backend/news/55.internal
new file mode 100644
index 0000000..bc4c39a
--- /dev/null
+++ b/backend/news/55.internal
@@ -0,0 +1 @@
+Allow use of environment variables for create-site script [@ericof]
diff --git a/backend/scripts/create_site.py b/backend/scripts/create_site.py
index cf96ca3..101294e 100644
--- a/backend/scripts/create_site.py
+++ b/backend/scripts/create_site.py
@@ -1,9 +1,10 @@
 from AccessControl.SecurityManagement import newSecurityManager
 from pathlib import Path
+from kitconcept.intranet.utils.scripts import asbool
+from kitconcept.intranet.utils.scripts import parse_answers
 from plone.distribution.api import site as site_api
 from Testing.makerequest import makerequest
 
-import json
 import logging
 import os
 import transaction
@@ -23,21 +24,6 @@
 
 SCRIPT_DIR = Path().cwd() / "scripts"
 
-truthy = frozenset(("t", "true", "y", "yes", "on", "1"))
-
-
-def asbool(s):
-    """Return the boolean value ``True`` if the case-lowered value of string
-    input ``s`` is a :term:`truthy string`. If ``s`` is already one of the
-    boolean values ``True`` or ``False``, return it."""
-    if s is None:
-        return False
-    if isinstance(s, bool):
-        return s
-    s = str(s).strip()
-    return s.lower() in truthy
-
-
 app = makerequest(globals()["app"])
 
 request = app.REQUEST
@@ -47,53 +33,60 @@ def asbool(s):
 newSecurityManager(None, admin)
 
 
-def get_answers_file() -> Path:
-    filename = f"{ANSWERS}.json"
+def get_answers_file(filename: str) -> Path:
     return SCRIPT_DIR / filename
 
 
-def parse_answers(answers_file: Path, site_id: str = "") -> dict:
-    answers = json.loads(answers_file.read_text())
-    if "distribution" not in answers:
-        # This is a bug in plone.distribution and should be fixed there
-        answers["distribution"] = DISTRIBUTION
-    if site_id:
-        answers["site_id"] = site_id
-    return answers
-
-
 # VARS
 DISTRIBUTION = os.getenv("DISTRIBUTION", "kitconcept-intranet")
-SITE_ID = os.getenv("SITE_ID")  # if set, this overrides the value in ANSWERS
-ANSWERS = os.getenv("ANSWERS", "default")
+ANSWERS_FILE = os.getenv("ANSWERS", "default.json")
 DELETE_EXISTING = asbool(os.getenv("DELETE_EXISTING"))
+# ANSWERS OVERRIDE
+ANSWERS = {
+    "site_id": os.getenv("SITE_ID"),
+    "title": os.getenv("SITE_TITLE"),
+    "description": os.getenv("SITE_DESCRIPTION"),
+    "default_language": os.getenv("SITE_DEFAULT_LANGUAGE"),
+    "portal_timezone": os.getenv("SITE_PORTAL_TIMEZONE"),
+    "workflow": os.getenv("SITE_WORKFLOW"),
+    "setup_content": os.getenv("SITE_SETUP_CONTENT", "true"),
+}
+
+
+def main():
+    # Load site creation parameters
+    answers_file = get_answers_file(ANSWERS_FILE)
+    answers = parse_answers(answers_file, ANSWERS)
+    if "distribution" not in answers:
+        answers["distribution"] = DISTRIBUTION
+    site_id = answers["site_id"]
 
-# Load site creation parameters
-answers_file = get_answers_file()
-answers = parse_answers(answers_file, SITE_ID)
-site_id = answers["site_id"]
-
-
-logger.info(f"Creating a new Plone site  @ {site_id}")
-logger.info(f" - Using the {DISTRIBUTION} distribution and answers from {answers_file}")
-
-
-if site_id in app.objectIds() and DELETE_EXISTING:
-    app.manage_delObjects([site_id])
-    transaction.commit()
-    app._p_jar.sync()
-    logger.info(f" - Deleted existing site with id {site_id}")
-else:
+    logger.info(f"Creating a new Plone site  @ {site_id}")
     logger.info(
-        f" - Stopping site creation, as there is already a site with id {site_id} "
-        "at the instance. Set DELETE_EXISTING=1 to delete the existing site before "
-        "creating a new one."
+        f" - Using the {DISTRIBUTION} distribution and answers from {answers_file}"
     )
 
-if site_id not in app.objectIds():
-    site = site_api._create_site(
-        context=app, distribution_name=DISTRIBUTION, answers=answers
-    )
-    transaction.commit()
-    app._p_jar.sync()
-    logger.info(" - Site created!")
+    if site_id in app.objectIds():
+        if DELETE_EXISTING:
+            app.manage_delObjects([site_id])
+            transaction.commit()
+            app._p_jar.sync()
+            logger.info(f" - Deleted existing site with id {site_id}")
+        else:
+            logger.info(
+                " - Stopping site creation, as there is already a site with id "
+                f"{site_id} at the instance. Set DELETE_EXISTING=1 to delete "
+                "the existing site before creating a new one."
+            )
+
+    if site_id not in app.objectIds():
+        site = site_api._create_site(
+            context=app, distribution_name=DISTRIBUTION, answers=answers
+        )
+        transaction.commit()
+        app._p_jar.sync()
+        logger.info(" - Site created!")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/backend/src/kitconcept/intranet/behaviors/theming.py b/backend/src/kitconcept/intranet/behaviors/theming.py
index 0ffff20..47c5af8 100644
--- a/backend/src/kitconcept/intranet/behaviors/theming.py
+++ b/backend/src/kitconcept/intranet/behaviors/theming.py
@@ -38,23 +38,19 @@
     "blocks_layout": {},
 }
 
-BLOCKS_SCHEMA = json.dumps(
-    {
-        "type": "object",
-        "properties": {
-            "blocks": {"type": "object"},
-            "blocks_layout": {"type": "object"},
-        },
-    }
-)
-
-FONT_VOCABULARY = SimpleVocabulary(
-    [
-        SimpleTerm(value="default", title=_("Default FZJ font")),
-        SimpleTerm(value="impact-arialNarrow", title=_("Impact / Arial Narrow")),
-        SimpleTerm(value="georgia-lucidaSans", title=_("Georgia / Lucida Sans")),
-    ]
-)
+BLOCKS_SCHEMA = json.dumps({
+    "type": "object",
+    "properties": {
+        "blocks": {"type": "object"},
+        "blocks_layout": {"type": "object"},
+    },
+})
+
+FONT_VOCABULARY = SimpleVocabulary([
+    SimpleTerm(value="default", title=_("Default FZJ font")),
+    SimpleTerm(value="impact-arialNarrow", title=_("Impact / Arial Narrow")),
+    SimpleTerm(value="georgia-lucidaSans", title=_("Georgia / Lucida Sans")),
+])
 
 
 @provider(IFormFieldProvider)
diff --git a/backend/src/kitconcept/intranet/utils/__init__.py b/backend/src/kitconcept/intranet/utils/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/src/kitconcept/intranet/utils/scripts.py b/backend/src/kitconcept/intranet/utils/scripts.py
new file mode 100644
index 0000000..8994886
--- /dev/null
+++ b/backend/src/kitconcept/intranet/utils/scripts.py
@@ -0,0 +1,31 @@
+from pathlib import Path
+
+import json
+
+
+truthy = frozenset(("t", "true", "y", "yes", "on", "1"))
+
+
+def asbool(s):
+    """Return the boolean value ``True`` if the case-lowered value of string
+    input ``s`` is a :term:`truthy string`. If ``s`` is already one of the
+    boolean values ``True`` or ``False``, return it."""
+    if s is None:
+        return False
+    if isinstance(s, bool):
+        return s
+    s = str(s).strip()
+    return s.lower() in truthy
+
+
+def parse_answers(answers_file: Path, answers_env: dict) -> dict:
+    answers = json.loads(answers_file.read_text())
+    for key in answers:
+        env_value = answers_env.get(key, "")
+        if key == "setup_content" and env_value.strip():
+            env_value = asbool(env_value)
+        elif not env_value:
+            continue
+        # Override answers_file value
+        answers[key] = env_value
+    return answers
diff --git a/backend/tests/utils/default.json b/backend/tests/utils/default.json
new file mode 100644
index 0000000..78b51af
--- /dev/null
+++ b/backend/tests/utils/default.json
@@ -0,0 +1,9 @@
+{
+    "site_id": "Plone",
+    "title": "Plone Intranet by kitconcept",
+    "description": "A Plone Intranet distribution provided by kitconcept GmbH",
+    "default_language": "en",
+    "portal_timezone": "Europe/Berlin",
+    "workflow": "public",
+    "setup_content": true
+}
diff --git a/backend/tests/utils/test_scripts.py b/backend/tests/utils/test_scripts.py
new file mode 100644
index 0000000..34cbaf1
--- /dev/null
+++ b/backend/tests/utils/test_scripts.py
@@ -0,0 +1,38 @@
+from kitconcept.intranet.utils.scripts import parse_answers
+from pathlib import Path
+
+import pytest
+
+
+@pytest.fixture
+def answers_file():
+    path = Path(__file__).parent / "default.json"
+    return path
+
+
+@pytest.mark.parametrize(
+    "key,value,expected",
+    (
+        ("site_id", "", "Plone"),
+        ("site_id", "Site", "Site"),
+        ("title", "Foo Bar", "Foo Bar"),
+        ("description", "A new site", "A new site"),
+        (
+            "description",
+            "",
+            "A Plone Intranet distribution provided by kitconcept GmbH",
+        ),
+        ("default_language", "", "en"),
+        ("default_language", "de", "de"),
+        ("portal_timezone", "", "Europe/Berlin"),
+        ("portal_timezone", "UTC", "UTC"),
+        ("workflow", "", "public"),
+        ("workflow", "private", "private"),
+        ("setup_content", "", True),
+        ("setup_content", "f", False),
+    ),
+)
+def test_parse_answers(answers_file, key: str, value: str, expected: str | bool):
+    answers = {key: value}
+    result = parse_answers(answers_file, answers)
+    assert result[key] == expected