diff --git a/localize/semantic_quality.py b/localize/semantic_quality.py
index dc0e4b1..00a4506 100644
--- a/localize/semantic_quality.py
+++ b/localize/semantic_quality.py
@@ -96,6 +96,19 @@ def to_dict(self) -> Dict[str, Any]:
         return asdict(self)
 
 
+_KNOWN_LOCALE_SPELLING_RULES = (
+    SemanticRule(
+        id="pcm-private-spelling",
+        message="Use 'Private' instead of 'Privet' in Nigerian Pidgin labels.",
+        locales=("pcm",),
+        source_regex=r"(?i)\bprivate\b",
+        forbidden_target_regex=r"(?i)\bprivet\b",
+        severity="error",
+        source="builtin-spelling",
+    ),
+)
+
+
 _SOURCE_WORD_RE = re.compile(r"[A-Za-z][A-Za-z'-]{6,}")
 _SOURCE_WORD_ALLOWLIST = {
     "clearnet",
@@ -645,7 +658,9 @@ def analyze_translation_changes(
     retained_source_word_allowlist: Optional[Mapping[str, Iterable[str]]] = None,
     examples_limit: int = 10,
 ) -> SemanticQAStats:
-    findings = evaluate_semantic_rules(changes, semantic_rules)
+    findings = evaluate_semantic_rules(
+        changes, (*semantic_rules, *_KNOWN_LOCALE_SPELLING_RULES)
+    )
     findings.extend(
         evaluate_retained_source_words(
             changes,
diff --git a/tests/unit/test_semantic_quality.py b/tests/unit/test_semantic_quality.py
index 9474a77..d52b6d1 100644
--- a/tests/unit/test_semantic_quality.py
+++ b/tests/unit/test_semantic_quality.py
@@ -84,6 +84,52 @@ def test_declarative_semantic_rule_blocks_forbidden_target_text(tmp_path):
     assert report["blocking"] is True
 
 
+def test_pidgin_private_labels_reject_privet_but_accept_private(tmp_path):
+    input_folder = tmp_path / "resources"
+    _write_properties(
+        input_folder / "messages.properties",
+        {
+            "chat.privateMessage": "Private message",
+            "chat.privateChat": "Private chat",
+            "chat.privateKey": "Private key",
+        },
+    )
+    diff_text = """diff --git a/resources/messages_pcm.properties b/resources/messages_pcm.properties
++++ b/resources/messages_pcm.properties
++chat.privateMessage=Privet mesaj
++chat.privateChat=Privet chat
++chat.privateKey=Private key
+"""
+
+    semantic_stats = analyze_semantic_qa_changes(
+        diff_text=diff_text,
+        repo_root=str(tmp_path),
+        input_folder=str(input_folder),
+        locale_codes=["pcm"],
+    )
+    report = build_quality_gate_report(
+        source_stats=analyze_source_identical_changes(
+            diff_text="",
+            repo_root=str(tmp_path),
+            input_folder=str(input_folder),
+            locale_codes=["pcm"],
+            brand_glossary=[],
+        ),
+        semantic_stats=semantic_stats,
+        validation_summary={"files": {}, "pipeline_warnings": []},
+        changed_files=["resources/messages_pcm.properties"],
+        input_folder=str(input_folder),
+        config=QualityGateConfig(),
+    )
+
+    assert semantic_stats.errors_count == 2
+    assert {example["key"] for example in semantic_stats.examples} == {
+        "chat.privateMessage",
+        "chat.privateChat",
+    }
+    assert report["blocking"] is True
+
+
 def test_retained_source_word_findings_are_warning_only_by_default():
     change = TranslationChange(
         file="resources/mobile_es.properties",