"especially pertinent to" is a grammatically correct phrase and can be used in written English.
It is typically used to denote that a particular part of a sentence or statement is particularly relevant or applicable to a certain topic or situation. Example: The discussion on climate change was especially pertinent to the group of environmental activists who were present at the conference.
The role of technology in helping resolve loneliness is especially pertinent to groups prone to social isolation, like new mothers.
It is especially pertinent to this one, an ancient policy that Mr Brown himself previously and stubbornly opposed.
Topics covered focus on practical areas especially pertinent to running a family business in the Asian context.
Especially pertinent to the show's theme is a display of prints, drawings, collages and works on paper filling the back gallery and a connecting corridor.
The reasons for their demise are not yet fully understood, but may be especially pertinent to understanding the effects of climate change on animal populations today.
I found the concept of being persecuted for your identity fascinating in this book, as it's especially pertinent to us in our current society, where people who have an identity (be it gender or religious identity or a person's sexuality) that doesn't conform to people's idea of normal are often persecuted.
But comparisons with openings of recent Greengrass films are not especially pertinent to Green Zone since The Bourne Ultimatum (£6.55m including £1.24m in previews) was a massively anticipated sequel, while United 93 (£617,000 from 276 screens) was hamstrung by very challenging subject matter and a no-name cast.
Developers can choose to restrict the advantages that can be purchased to purely aesthetic choices, but might chose to more aggressively pursue microtransactions in order to recoup the costs of running a game over a period of years, an issue that might be especially pertinent to Grand Theft Auto 5.
This advice is especially pertinent to female founders due to the nature of how women are often raised, Livingston said.
Among six major lines of inquiry on motivations, two theories are especially pertinent to consumer behavior studies: values and goals.
Rawls made a change in his presentation of the Original Position in his Restatement (2001) that is especially pertinent to people with cognitive disabilities.
