"accurately speaking" is a correct and usable phrase in written English. You can use it to emphasize precision in a statement or opinion. For example, "Accurately speaking, the team completed the project on time.".
When it is, more accurately speaking, a pay-what-you-want tour.
Accurately speaking, the Murphy bed has not so much returned as evolved.
More accurately speaking, it was the cheap plonk that he was absolutely bonkers for.
That lesson is simply that we may more accurately speak of American histories, rather than a single, monolithic American history.
The researchers dated the fossils by measuring the ratio of uranium to its decay product lead, which allows them to estimate their age quite accurately, geologically speaking: within six million years.
On Monday, Jay Carney, the White House spokesman, said Mr. Biden was "speaking accurately".
Congenitally unable to say or do things in an expected, conventional way, Audiard is back in the Cannes competition with "Dheepan," a feature he accurately described, now speaking through a translator, as "a French film where people speak Tamil".
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.
Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com