|This page in a nutshell: Be cautious with expressions that may introduce bias, lack precision, or include offensive terms. Use clear, direct language. Let facts alone do the talking.|
There are no forbidden words or expressions on Wikipedia, but certain expressions should be used with caution, because they may introduce bias. Strive to eliminate expressions that are flattering, disparaging, vague, clichéd, or endorsing of a particular viewpoint.
The advice in this guideline is not limited to the examples provided and should not be applied rigidly. For example, some words have specific technical meanings in some contexts and are acceptable in those contexts, e.g. "claim" in law. What matters is that articles should be well-written and consistent with the core content policies—Neutral point of view, No original research, and Verifiability. The guideline does not apply to quotations, which should be faithfully reproduced from the original sources; see the section on quotations in the main Manual of Style.
If you do not feel you can improve the problematic wording of an article yourself, a template message can be added to draw the attention of others to an article needing a cleanup.
Words that may introduce bias