diff --git a/soapbox/build.py b/soapbox/build.py
index de957e7..e898644 100644
--- a/soapbox/build.py
+++ b/soapbox/build.py
@@ -18,6 +18,7 @@ import shutil
 from datetime import UTC, datetime
 from email.utils import format_datetime
 from pathlib import Path
+from urllib.parse import quote
 from xml.sax.saxutils import escape
 
 from jinja2 import ChoiceLoader, Environment, FileSystemLoader, select_autoescape
@@ -113,7 +114,7 @@ def _feed(cfg: Config, site: dict, posts: list[Post]) -> str:
     base = cfg.site_url + "/"
     items = []
     for p in posts:
-        link = base + p.url_path
+        link = base + quote(p.url_path)  # RSS-lesere krever ASCII-URL-er
         items.append(
             "<item>"
             f"<title>{escape(p.title)}</title>"
diff --git a/soapbox/slug.py b/soapbox/slug.py
index 8f9c125..5cc2764 100644
--- a/soapbox/slug.py
+++ b/soapbox/slug.py
@@ -1,7 +1,10 @@
 """Lager URL-vennlige slugs fra titler.
 
-Norske tegn translittereres eksplisitt (æ→ae, ø→oe, å→aa) fordi generisk
-unicode-normalisering ville mistet dem helt ("blåbær" → "blbr").
+Unicode-bokstaver beholdes ("Grønt er skjønt" → "grønt-er-skjønt"); moderne
+nettlesere og servere håndterer UTF-8 i stier, og det gir penere og mer
+lesbare adresser enn translitterering. Teksten NFC-normaliseres slik at
+f.eks. «ø» skrevet som base + kombinerende tegn (vanlig fra macOS) gir samme
+slug som det prekomponerte tegnet.
 """
 
 from __future__ import annotations
@@ -9,15 +12,13 @@ from __future__ import annotations
 import re
 import unicodedata
 
-_NORDIC = str.maketrans(
-    {"æ": "ae", "ø": "oe", "å": "aa", "ä": "ae", "ö": "oe", "ü": "ue", "ß": "ss"}
-)
+# Alt som ikke er bokstav eller tall (i alle skriftsystemer) blir skilletegn.
+_SEP = re.compile(r"[^\w]+|_+", re.UNICODE)
 
 
 def slugify(text: str) -> str:
-    text = text.lower().translate(_NORDIC)
-    text = unicodedata.normalize("NFKD", text).encode("ascii", "ignore").decode()
-    text = re.sub(r"[^a-z0-9]+", "-", text).strip("-")
+    text = unicodedata.normalize("NFC", text).casefold()
+    text = _SEP.sub("-", text).strip("-")
     return text or "post"
 
 
diff --git a/tests/test_app.py b/tests/test_app.py
index a6997c0..3a09710 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -1,4 +1,5 @@
 import re
+from urllib.parse import unquote
 
 from soapbox.app import create_app
 from soapbox.config import load_config
@@ -50,31 +51,31 @@ def test_full_flow_owner(client, cfg):
         f"/admin/edit/{post_id}",
         data={"csrf": token, "title": "Grønt er skjønt", "body": body, "action": "publish"},
     )
-    assert r.headers["Location"].endswith("/admin/edit/_owner/groent-er-skjoent")
-    assert (cfg.content_dir / "posts/groent-er-skjoent/index.md").exists()
-    assert (cfg.content_dir / "posts/groent-er-skjoent/mitt-bilde.png").exists()
+    assert unquote(r.headers["Location"]).endswith("/admin/edit/_owner/grønt-er-skjønt")
+    assert (cfg.content_dir / "posts/grønt-er-skjønt/index.md").exists()
+    assert (cfg.content_dir / "posts/grønt-er-skjønt/mitt-bilde.png").exists()
 
     # Statisk output
-    r = client.get("/groent-er-skjoent")
-    assert r.status_code == 301 and r.headers["Location"].endswith("/groent-er-skjoent/")
-    html = client.get("/groent-er-skjoent/").text
+    r = client.get("/grønt-er-skjønt")
+    assert r.status_code == 301 and unquote(r.headers["Location"]).endswith("/grønt-er-skjønt/")
+    html = client.get("/grønt-er-skjønt/").text
     assert "<strong>verden</strong>" in html
     assert 'href="../theme/style.css"' in html
     assert 'href="../theme/favicon.svg"' in html
     assert 'href="../"' in html  # intern lenke omskrevet til relativ
-    assert client.get("/groent-er-skjoent/mitt-bilde.png").status_code == 200
+    assert client.get("/grønt-er-skjønt/mitt-bilde.png").status_code == 200
     front = client.get("/").text
     assert "Grønt er skjønt" in front
     assert 'href="https://kode.naiv.no/olemd/soapbox"' in front  # AGPL: lenke til kilden
     feed = client.get("/feed.xml").text
-    assert "https://blog.example.no/groent-er-skjoent/" in feed
+    assert "https://blog.example.no/gr%C3%B8nt-er-skj%C3%B8nt/" in feed
 
     # Etter publisering fryses slug selv om tittelen endres
     r = client.post(
-        "/admin/edit/_owner/groent-er-skjoent",
+        "/admin/edit/_owner/grønt-er-skjønt",
         data={"csrf": token, "title": "Ny tittel", "body": body, "action": "save"},
     )
-    assert r.headers["Location"].endswith("/admin/edit/_owner/groent-er-skjoent")
+    assert unquote(r.headers["Location"]).endswith("/admin/edit/_owner/grønt-er-skjønt")
 
     # Git-historikk
     from soapbox.gitstore import log
diff --git a/tests/test_core.py b/tests/test_core.py
index f00586d..3323141 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -9,7 +9,10 @@ from tests.conftest import png_bytes
 
 
 def test_slugify_norwegian():
-    assert slugify("Grønt er skjønt: blåbær & øl!") == "groent-er-skjoent-blaabaer-oel"
+    assert slugify("Grønt er skjønt: blåbær & øl!") == "grønt-er-skjønt-blåbær-øl"
+    assert slugify("Hello, World_2!") == "hello-world-2"
+    assert slugify("Blåbær") == slugify("Bla\u030abær")  # NFD → NFC
+    assert slugify("日本語 タイトル") == "日本語-タイトル"
     assert slugify("   ") == "post"
     assert unique_slug("a", {"a", "a-2"}) == "a-3"