fix: write region names in pack READMEs as labels

packreadme title-cased each slug, printing asia-ntsc as Asia Ntsc.
region.label() holds the words the site already used, and both read it.

scripts/generate_site.py

@@ -7750,20 +7750,17 @@ def _distinct_spellings(names: list) -> list[str]:
     return list(seen.values())
 
 
-# Region slugs whose words are not the slug title-cased.
-_REGION_WORDS = {
-    "uk": "UK",
-    "asia-ntsc": "Asia (NTSC)",
-    "asia-pal": "Asia (PAL)",
-    "world": "every region",
-}
+# Region slugs whose words are not the slug title-cased, beyond region.LABELS.
+_REGION_WORDS = {"world": "every region"}
 
 
 def _region_words(value: object, most: int = 0) -> str:
     """A region: value in words. ``most`` caps the regions named, the rest
     counted: one Saturn BIOS serves seven."""
     raw = value if isinstance(value, list) else [value] if value else []
-    words = [_REGION_WORDS.get(str(r), str(r).replace("-", " ").title()) for r in raw]
+    from region import label  # noqa: PLC0415
+
+    words = [_REGION_WORDS.get(str(r)) or label(str(r)) for r in raw]
     if most and len(words) > most:
         words = words[:most] + [f"{len(words) - most} more"]
     return _said_as_list(words)

scripts/packreadme.py

@@ -5,6 +5,7 @@ goes, and which ones the user has to rename."""
 
 from __future__ import annotations
 
+from region import label as region_label
 from siteguides import INSTALL_PS1, INSTALL_SH, pack_manual
 
 def _detect_systems(detect: list[dict]) -> list[str]:
@@ -290,9 +291,7 @@ def _build_readme(
 
     region_info = ""
     if regions:
-        pretty = ", ".join(
-            " ".join(w.title() for w in slug.split("-")) for slug in regions
-        )
+        pretty = ", ".join(region_label(slug) for slug in regions)
         region_info = (
             "PACK TYPE: Region Filtered\n\n"
             f"  Region priority: {pretty}\n\n"

scripts/region.py

@@ -107,6 +107,19 @@ ALIASES: dict[str, str] = {
 }
 
 
+# Slugs a person does not write title-cased: "Asia Ntsc" read as machine text.
+LABELS: dict[str, str] = {
+    "uk": "UK",
+    "asia-ntsc": "Asia (NTSC)",
+    "asia-pal": "Asia (PAL)",
+}
+
+
+def label(slug: str) -> str:
+    """A region slug in words: north-america as North America."""
+    return LABELS.get(slug) or " ".join(word.title() for word in slug.split("-"))
+
+
 def unknown_region_message(raw: str, aliases: dict[str, str], regions: frozenset[str]) -> str:
     """What to type instead: the closest spellings, then every short form.