Inclusive language

Inclusive language aims to avoid offense and fulfill the ideals of egalitarianism by avoiding expressions that express or imply ideas that are sexist, racist, or otherwise biased, prejudiced, or denigrating to any particular group of people (and sometimes animals as well). Use of inclusive language might be considered a form of political correctness; often the term "political correctness" is used to refer to this practice, either as a neutral description by supporters or commentators in general or with negative connotations among its opponents.
Its supporters argue that language is often used to perpetuate and spread prejudice and that creating intention around using inclusive language can help create more productive, safe, and profitable organizations and societies.
Examples.
The neurodiversity movement including the autism rights movement sees various neurological conditions not as diseases to be cured, but differences to be embraced, like left-handedness or homosexuality. Proponents might object to calling autism a mental disability, and might prefer "neurotypical" to "healthy" or "normal".
Comments about personal appearance might be interpreted as lookism or sexual harassment, depending on the context.
Criticism and limitations.
Some people object to the idea of being pressured into speaking and writing in a way that does not come naturally, and criticize the proposed changes as a form of socially enforced censorship that unnecessarily constrains freedom of speech.
Many people do not enjoy being criticized for using "offensive" language, when no offense was meant and they do not advocate the ideas which inclusivists say are implicit in the language. Sometimes people use inclusive language because it is socially acceptable, despite actually holding discriminatory views, either openly or secretly. Advocates hope that asking people to use inclusive language, even if they don't explicitly discriminate, encourages people to consider the concerns of the group in question more seriously than they might otherwise, and may reduce unconscious biases such as those reported by implicit-association tests. Owing to the effects of euphemism treadmills, even some organizations who advocate on behalf of certain groups of people have had to change their names to avoid a term which was preferred by the group at the time of founding.
The conservative worldview also emphasizes tradition, and the push for language inclusivity can be seen by conservatives as an artificial and unwelcome attempt at language change that undermines the clarity of a more familiar way of speaking. Many people opposed to illegal immigration or immigration in general prefer the term "illegal immigrants" over "undocumented immigrants" (for example in discussion of policy or economics) because it emphasizes the improperness of the method of entry.