diff --git a/platform/backend/app/analytics/localization.py b/platform/backend/app/analytics/localization.py
index 3ab5fb2..df00bff 100644
--- a/platform/backend/app/analytics/localization.py
+++ b/platform/backend/app/analytics/localization.py
@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import re
+import unicodedata
 from typing import Any
 
 TEAM_NAMES = {
@@ -138,11 +140,128 @@ def _clean(value: Any) -> str:
     return str(value or '').strip()
 
 
+# External feeds and bookmakers use several spellings for the same national team.
+# Keep this list intentionally broad so the public API never leaks mixed English names.
+TEAM_NAMES.update(
+  {
+    "South Korea": "南韓",
+    "Korea Republic": "南韓",
+    "Republic of Korea": "南韓",
+    "ROK": "南韓",
+    "南韓": "南韓",
+    "韓國": "南韓",
+    "Czechia": "捷克",
+    "Czech Republic": "捷克",
+    "捷克": "捷克",
+    "Bosnia and Herzegovina": "波士尼亞與赫塞哥維納",
+    "Bosnia & Herzegovina": "波士尼亞與赫塞哥維納",
+    "Bosnia-Herzegovina": "波士尼亞與赫塞哥維納",
+    "Bosnia": "波士尼亞與赫塞哥維納",
+    "Paraguay": "巴拉圭",
+    "Algeria": "阿爾及利亞",
+    "Morocco": "摩洛哥",
+    "Switzerland": "瑞士",
+    "Scotland": "蘇格蘭",
+    "Wales": "威爾斯",
+    "Poland": "波蘭",
+    "Denmark": "丹麥",
+    "Serbia": "塞爾維亞",
+    "Chile": "智利",
+    "Peru": "秘魯",
+    "Venezuela": "委內瑞拉",
+    "Bolivia": "玻利維亞",
+    "Costa Rica": "哥斯大黎加",
+    "Honduras": "宏都拉斯",
+    "Jamaica": "牙買加",
+    "Panama": "巴拿馬",
+    "El Salvador": "薩爾瓦多",
+    "Guatemala": "瓜地馬拉",
+    "Haiti": "海地",
+    "Trinidad and Tobago": "千里達及托巴哥",
+    "Trinidad & Tobago": "千里達及托巴哥",
+    "Curacao": "庫拉索",
+    "Curaçao": "庫拉索",
+    "Dominican Republic": "多明尼加共和國",
+    "New Zealand": "紐西蘭",
+    "Australia": "澳洲",
+    "Saudi Arabia": "沙烏地阿拉伯",
+    "Qatar": "卡達",
+    "United Arab Emirates": "阿拉伯聯合大公國",
+    "UAE": "阿拉伯聯合大公國",
+    "Iraq": "伊拉克",
+    "Jordan": "約旦",
+    "Oman": "阿曼",
+    "Uzbekistan": "烏茲別克",
+    "Iran": "伊朗",
+    "Japan": "日本",
+    "China PR": "中國",
+    "China": "中國",
+    "North Korea": "北韓",
+    "Cameroon": "喀麥隆",
+    "Ghana": "迦納",
+    "Ivory Coast": "象牙海岸",
+    "Cote d'Ivoire": "象牙海岸",
+    "Côte d’Ivoire": "象牙海岸",
+    "Senegal": "塞內加爾",
+    "Nigeria": "奈及利亞",
+    "Tunisia": "突尼西亞",
+    "Egypt": "埃及",
+    "Mali": "馬利",
+    "DR Congo": "剛果民主共和國",
+    "Congo DR": "剛果民主共和國",
+    "South Africa": "南非",
+  }
+)
+
+TEAM_NAME_ALIASES = {
+  "usmnt": "United States",
+  "usa": "United States",
+  "u s a": "United States",
+  "united states of america": "United States",
+  "mex": "Mexico",
+  "can": "Canada",
+  "kor": "South Korea",
+  "korea republic": "South Korea",
+  "republic of korea": "South Korea",
+  "czechia": "Czechia",
+  "czech republic": "Czechia",
+  "bosnia and herzegovina": "Bosnia and Herzegovina",
+  "bosnia herzegovina": "Bosnia and Herzegovina",
+  "bosnia": "Bosnia and Herzegovina",
+  "paraguay": "Paraguay",
+}
+
+
+def _normalize_lookup_key(value: Any) -> str:
+  text = unicodedata.normalize("NFKD", _clean(value))
+  text = "".join(ch for ch in text if not unicodedata.combining(ch))
+  text = text.replace("&", " and ")
+  text = re.sub(r"[^0-9A-Za-z\u4e00-\u9fff]+", " ", text)
+  return re.sub(r"\s+", " ", text).strip().lower()
+
+
 def _lookup(value: Any, mapping: dict[str, str]) -> str:
-    text = _clean(value)
-    if not text:
-        return '待確認'
-    return mapping.get(text, mapping.get(text.lower(), text))
+  text = _clean(value)
+  if not text:
+    return '待確認'
+
+  direct = mapping.get(text) or mapping.get(text.lower())
+  if direct:
+    return direct
+
+  normalized = _normalize_lookup_key(text)
+  if mapping is TEAM_NAMES:
+    alias = TEAM_NAME_ALIASES.get(normalized)
+    if alias:
+      alias_value = mapping.get(alias) or mapping.get(alias.lower())
+      if alias_value:
+        return alias_value
+
+  for key, translated in mapping.items():
+    if _normalize_lookup_key(key) == normalized:
+      return translated
+
+  return text
 
 
 def localize_team_name(value: Any) -> str:
diff --git a/platform/backend/app/main.py b/platform/backend/app/main.py
index e2045f7..a42f688 100644
--- a/platform/backend/app/main.py
+++ b/platform/backend/app/main.py
@@ -1283,11 +1283,20 @@ async def _query_match_list(limit: int = 200) -> list[dict[str, Any]]:
       '_raw_status': str(status.value if hasattr(status, 'value') else status),
       '_result_synced_at': result_synced_at,
     }
-    key = (
-      home_label.strip().lower(),
-      away_label.strip().lower(),
-      kickoff_utc.isoformat() if hasattr(kickoff_utc, 'isoformat') else str(kickoff_utc),
+    team_pair_key = tuple(
+      sorted(
+        (
+          " ".join(home_label.strip().lower().split()),
+          " ".join(away_label.strip().lower().split()),
+        )
+      )
     )
+    kickoff_key = (
+      kickoff_utc.replace(minute=0, second=0, microsecond=0).isoformat()
+      if hasattr(kickoff_utc, 'isoformat') and hasattr(kickoff_utc, 'minute')
+      else str(kickoff_utc)[:13]
+    )
+    key = (*team_pair_key, kickoff_key)
     current = deduped.get(key)
     if current is None or quality_rank(payload) > quality_rank(current):
       deduped[key] = payload