Support language tag customization

pkg/builders/youtube.go

@@ -230,6 +230,10 @@ func (yt *YouTubeBuilder) queryFeed(feed *model.Feed) (*itunes.Podcast, string,
 		podcast.IExplicit = "no"
 	}
 
+	if feed.Language != "" {
+		podcast.Language = feed.Language
+	}
+
 	return &podcast, itemID, nil
 }
 

pkg/model/model.go

@@ -35,4 +35,5 @@ type Feed struct {
 	ExpirationTime time.Time `sql:"-" dynamodbav:",unixtime"`
 	CoverArt       string    `dynamodbav:",omitempty"`
 	Explicit       bool
+	Language       string `dynamodbav:",omitempty"` // ISO 639
 }