The phrase "accepted to speak" is correct and usable in written English.
It can be used when referring to someone who has been granted permission or an invitation to give a speech or presentation at an event.
Example: "She was accepted to speak at the international conference on climate change."
Alternatives: "invited to speak" or "approved to present".
Wrexham have had an official approach accepted to speak to Gateshead manager Gary Mills about becoming their new boss.
And lately, he accepted to speak, on the record, to the the German paper FAZ to specify he was staying aside from the Synod on the family and had "excellent contacts" with Francis.
Out of 38 Salafi congregations that accepted to speak to the Islamic leadership, 24 rejected the legitimacy of the Islamic community in Bosnia, declined to become its official members and, with that, denied the legitimacy of Bosnian Islam as Islam at all.
But the subpoena to Mr. Rendell, earlier reported by The Washington Times, raises the possibility that a long list of former officials who have accepted fees to speak on behalf of the M.E.K., including former directors of the Central Intelligence Agency and the Federal Bureau of Investigation, could come under scrutiny for any payments traced to the group.
In 2009, he accepted $50,000 to speak in Azerbaijan, a former Soviet republic with an authoritarian government.
She's accepted invitations to speak publicly, she says, "because other people might get something useful from it".
In addition to Notre Dame, the president has accepted requests to speak at commencement ceremonies at the United States Naval Academy and Arizona State University.
Soon after his arrival in this country, Solzhenitsyn accepted invitations to speak to the A.F.L.-C.I.O. in New York and Washington, at the Hoover Institution, in California, and, most notoriously, at the 1978 Harvard graduation ceremonies.
But Mrs. Lotz, a former full-time homemaker and mother of three adult children, has accepted invitations to speak before large groups around the world and in the United States.
After Doreen was accepted to Columbia, she spoke with people at the admissions office.
I accept invitations to speak only if there are students available.
