Answer found

But it's only available in these languages:

• English (United States): What does 5/10/unlimited audiotracks mean exactly
• Deutsch: Was genau bedeutet 5/10/unbegrenzte Tonspuren?
• Español: ¿Qué quiere decir 5/10/ilimitadas pistas de audio?
• Português: O que significa 5/10/sem limite faixas de áudio
• Chinese (Sim.) (简体中文): 5/10/无限音轨，是什么意思？
• Français: Que veut dire 5/10/ nombre illimité de pistes audio
• Italiano: Cosa significa esattamente 5/10/unlimited audiotracks?