“The president has been clear to all of us — words matter, tone matters and civility matters,” said Jen Psaki, the White House press secretary.

Days after President Biden took office, the Bureau of Land Management put a scenic landscape of a winding river at the top of its website, which during the previous administration had featured a photograph of a huge wall of coal.

At the Department of Homeland Security, the phrase “illegal alien” is being replaced with “noncitizen.” The Interior Department now makes sure that mentions of its stakeholders include “Tribal” people (with a capital “T” as preferred by Native Americans, it said). The most unpopular two words in the Trump lexicon — “climate change” — are once again appearing on government websites and in documents; officials at the Environmental Protection Agency have even begun using the hashtag #climatecrisis on Twitter.

And across the government, L.G.B.T.Q. references are popping up everywhere. Visitors to the White House website are now asked whether they want to provide their pronouns when they fill out a contact form: she/her, he/him or they/them.

It is all part of a concerted effort by the Biden administration to rebrand the government after four years of President Donald J. Trump, in part by stripping away the language and imagery that represented his anti-immigration, anti-science and anti-gay rights policies and replacing them with words and pictures that are more inclusive and better match the current president’s sensibilities.

“Biden is trying to reclaim the vision of America that was there during the Obama administration, a vision that was much more diverse, much more religiously tolerant, much more tolerant of different kinds of gender dispositions and gender presentations,” said Norma Mendoza-Denton, a professor of anthropology at the University of California, Los Angeles, and an author of “Language in the Trump Era: Scandals and Emergencies.”