We need to translate visible text, preserve HTML tags. Must output only translation. So we translate each text node. Let's go paragraph by paragraph. Original:

When the prequels of the Star Wars series were being filmed, the production team had to manage their playful cast. Can you guess what Hayden Christensen did during the shoot? Let’s find out. 

Translate to Japanese: "スター・ウォーズシリーズの前日譚が撮影されていたとき、制作チームは遊び好きなキャストを管理しなければなりませんでした。ハイデン・クリステンセンが撮影中に何をしたのか、想像できますか?さあ、見てみましょう。 " Preserve   at end. Next:

George Lucas had to stop filming during lightsaber battles. Lucas had to ask Hayden Christensen to stop making lightsaber sound effects, to which Christensen was unaware he was making lightsaber sounds.

Translate: "ジョージ・ルーカスはライトセーバーの戦闘中に撮影を中止しなければなりませんでした。ルーカ