tools: align locale diagnostics and generate native language names

tools/upstream/keys.go

@@ -11,7 +11,12 @@ import (
 // TrN keys. Dynamic translation keys require an explicit adapter review.
 func ReferencedKeys(s *Snapshot) ([]string, error) {
 	fns := template.FuncMap{}
-	for _, name := range []string{"AppUrl", "AppName", "AppDomain", "DotEscape", "QueryEscape", "ShortSha", "HTMLFormat", "PathEscapeSegments", "FormatByteSize", "Dict", "dict", "StringUtils", "SliceUtils", "JsonUtils", "QueryBuild", "PathEscape", "SanitizeHTML"} {
+	for _, name := range []string{
+		"AppUrl", "AppName", "AppDomain", "DotEscape", "QueryEscape",
+		"ShortSha", "HTMLFormat", "PathEscapeSegments", "FormatByteSize",
+		"Dict", "dict", "StringUtils", "SliceUtils", "JsonUtils", "QueryBuild",
+		"PathEscape", "SanitizeHTML"} {
+
 		fns[name] = func(...any) string { return "" }
 	}
 	keys := map[string]bool{}