The phrase "a commitment to speak" is correct and usable in written English.
You can use it when discussing a promise or obligation to communicate or express thoughts on a particular topic.
Example: "The organization has made a commitment to speak openly about mental health issues in the community."
Alternatives: "a promise to communicate" or "an obligation to express".
United by our shared values, Fighting Poverty with Faith kicked off this week with a commitment to speaking out on poverty, educating the public and our leaders, and cutting poverty in half by 2020.
When she took her place onstage, she was greeted with jeers that did not end even when she apologized, explaining that she had had a previous commitment to speak at an anti-bullying event.
They made a public commitment to speak up for science and for women, minorities, immigrants, people with disabilities and LGBTQIA people.
I was so moved by Mandela's courage and his commitment to speak the truth about Palestinians that I made a poster commemorating the Mandela-Arafat embrace including an excerpt of his words.
As an antidote to that virus I intend to write my resignation letter and keep it in my inside pocket, ready to submit it the moment I sense signs of losing the commitment to speak truth to power".
As his communication skills developed, Joey expressed his desire and commitment to speak, to have his own voice, and to be heard.
"I hope that the pope's words will inspire our president and Congress to demonstrate a like commitment to speaking the truth about the Armenian genocide and to renounce Turkey's campaign of concealment and denial".
28), Robin D. G. Kelley mentions Simone's song "Mississippi Goddam" as an example of her commitment to "speaking out against racism and injustice".
In addition to the Nobel Prize, Tutu received numerous honours, including the U.S. Presidential Medal of Freedom (2009), an award from the Mo Ibrahim Foundation that recognized his lifelong commitment to "speaking truth to power" (2012), and the Templeton Prize (2013).
"We made this award in recognition of his lifelong commitment to speaking truth to power," said Mo Ibrahim.
