This is also the most awaiting feature from many of us, As mentioned in MC245302, This new slide translation feature in Microsoft Teams (desktop) will enable all meeting attendees to translate presentation content, presented via PowerPoint Live in a Teams meeting, into a language of their choice while in private view.
This will begin rolling this out in early April and expect to complete the rollout by late April.
Meeting attendees will see the slide translation feature when the presenter uses PowerPoint Live in a Teams meeting. Each meeting attendee will be able to convert the slide show content into one of nineteen languages of their preference. This unique experience will only occur for the user requesting slide translation without interrupting the presenter or any other attendees in the meeting.
PowerPoint slide translation is available in nineteen languages.
And this is how you should navigate and translate the presentation.