Check numeric rating value after splitting country code

Emby.Server.Implementations/Localization/LocalizationManager.cs

@@ -385,7 +385,7 @@ namespace Emby.Server.Implementations.Localization
 
             // Convert ints directly
             // This may override some of the locale specific age ratings (but those always map to the same age)
-            if (int.TryParse(rating, out var ratingAge))
+            if (TryParseRatingAsScore(rating, out var ratingAge))
             {
                 return new(ratingAge, null);
             }
@@ -487,6 +487,13 @@ namespace Emby.Server.Implementations.Localization
                     return true;
                 }
 
+                // If it's not a recognized rating string, fall back to using the number as the score
+                if (TryParseRatingAsScore(ratingPart, out var numericScore))
+                {
+                    result = new ParentalRatingScore(numericScore, null);
+                    return true;
+                }
+
                 _logger.LogWarning(
                     "Rating '{Rating}' not found in the '{CountryCode}' rating system, treating as unrated",
                     rating,
@@ -501,6 +508,18 @@ namespace Emby.Server.Implementations.Localization
             return true;
         }
 
+        /// <summary>
+        /// Tries to parse a rating as a number, allowing an optional trailing '+' (e.g. "16" or "18+").
+        /// </summary>
+        /// <param name="ratingValue">Rating value to parse.</param>
+        /// <param name="score">Parsed score.</param>
+        /// <returns>Returns true if parsing was successful.</returns>
+        private static bool TryParseRatingAsScore(string ratingValue, out int score)
+        {
+            var trimmed = ratingValue.TrimEnd('+');
+            return int.TryParse(trimmed, out score);
+        }
+
         /// <inheritdoc />
         public string GetLocalizedString(string phrase)
         {