Increment exported vars for every language in a post

cmd/consumer/consumer.go

@@ -320,12 +320,10 @@ func (c *Consumer) processMessage(ctx context.Context, typ string, r io.Reader,
 			}
 			langs, _, err := repo.GetLang(ctx, v)
 			if err == nil {
-				lang := ""
-				if len(langs) != 0 {
-					lang = langs[0]
-				}
+				for _, lang := range langs {
 					postsByLanguageIndexed.WithLabelValues(c.remote.Host, lang).Inc()
 				}
+			}
 			recs = append(recs, repo.Record{
 				Repo:       models.ID(repoInfo.ID),
 				Collection: parts[0],