ARMS Institute:Manual of Style for Articles

Formal Tone

• Avoid slang and contractions.
• Avoid the first-person and second-person points of view.
• Avoid situations where genderless singular pronouns are required. (Use they/them/their as a last resort, but try to avoid this because it breaks subject/verb agreement.)

Localization

• For consistency, use American-style English, e.g. "localization" instead of "localisation" and "color" instead of "colour". Redirects from UK spellings to US spellings are okay.
• Use the #dateformat magic word when inputting dates. This will allow users to see the dates in the format they've chosen in their preferences.