The phrase "spoke strongly" is correct and can be used in written English.
It means to speak with conviction or emphasis. Example: During the meeting, the CEO spoke strongly about the need for stricter safety regulations in the workplace.
Most Republicans spoke strongly against the limits on time and the use of ground troops.
Lawmakers from both sides of the aisle spoke strongly in favor of fighting rising college costs.
O'Neill spoke strongly about wanting to return to the Yankees next season because they always win.
Ensconced at the academy, he spoke strongly on behalf of the virtues of physical education.
And Giulio Tremonti, the Italian economics minister, spoke strongly in favor of the idea over the weekend.
She says the story spoke strongly to her. "I've often felt I don't belong quite wherever I am.
The Venezuelan delegation spoke strongly about the issue: The convention and the Paris agreement is an instrument between states.
Its conception was more eclectic but many sessions spoke strongly of tribal and mining rights and corporate misgovernance.
Despite Cashman's age and relative lack of experience (he is the second-youngest general manager in major league history), he spoke strongly and authoritatively after his introduction yesterday.
Thoughts?" Others, such as Philip Davies and Charles Walker, spoke strongly against the ban on the grounds of civil liberties and fears it would be unenforceable.
There were mutterings as this summer's Euros progressed from disappointing to dismal, but it was also notable that many of her players spoke strongly in her support.
