"spoke in front of" is correct and usable in written English.
You can use it when referring to someone speaking to an audience or making a presentation. For example, "The CEO spoke in front of a packed room of investors."
He spoke in front of the main embassy building, which appeared undamaged.
Prokhorov spoke in front of a backdrop that declared the organization's theme of the night: "An Evening of Russian Culture".
As Rodriguez spoke in front of his locker afterward, he was asked whether he could enjoy himself.
Mr. Bloomberg spoke in front of a building in Ridgewood where teenage workers were about to paint over graffiti.
He spoke in front of an electric truck later revealed to have been built in the UK.
After Charlie Hebdo, the French prime minister Manuel Valls spoke in front of parliament of a country "at war".
Tells about the reception at the various places, and about his appearance at Columbia University where he spoke in front of Low Memorial Library.
He spoke in front of a screen displaying a series of company slogans, including "Cars can be fuel-efficient without being neutered".
When he spoke in front of the United Nations General Assembly in September, a day after President Bush, he said, "The devil came here yesterday".
Before the game, Posada spoke in front of his locker and sounded contrite and remorseful, as if good sense and a good night's sleep had sharpened his perspective.
But the Barack Obama who spoke in front of the Brandenburg Gate to a few thousand people on June 19 looked a lot different from the one who spoke in front of the Siegessäule in July 2008 in front of more than 200,000 people, who had gathered in the heart of Berlin to listen to Mr. Obama, then running for president.
