A style guide supports clarity and consistency by documenting the organization's internal decisions about how texts should be written. Some guides (e.g., for startups and social media companies) focus on content and emphasize the language and audience, whereas others (e.g., for think tanks and academia) will often prioritize the more technical aspects of writing such as spelling, grammar and referencing styles. Topics will often include, among other things:

Abbreviations, acronyms and initialisms: Define first-use rules, whether periods are allowed (e.g., WTO / W.T.O.), when terms must be spelled out again, how abbreviation lists are handled and how articles such as “a” or “an” work before initials.

Capitalization: Set rules for sentence case vs. title case, headings, job titles (Assistant Professor / assistant professor), departments, academic subjects, programs, official bodies and words following colons or in lists.

Citations, references and source notes: Define the house citation system, in-text citation style (e.g., author-date), bibliography / reference formatting, DOI/URL handling and footnotes vs. endnotes.

Dates and times: Specify date order, punctuation in dates, year spans (2020-2022 / 2020-22), decade style, time style and how date ranges should be written.

Exceptions: Explain which exceptions to the rules can and should be made (e.g., numbers in a group).

Headings, subheadings and title treatment: Specify how titles, subtitles, section heads, publication titles, as well as titles for reports, articles, books, journals and programs should be formatted.

Numbers, numerals, percentages and ranges: Decide when numbers are spelled out (eight, nine, 10), when numerals are required (5 km), how percentages appear in text vs. tables, and how number ranges and large numbers are formatted.

Punctuation: Define house rules for comma style (serial / open), quotation marks, commas and periods with quotation marks, colons, semicolons, slashes, when to apply en dashes vs. em dashes and punctuation around footnotes.

Spelling standards: Choose a primary standard such as US or UK English, define preferred spellings and explain how to handle exceptions when the names of organizations use another variant.

More content-focused topics could include:
     ● Audience, purpose and channel adaptation 
     ● Brand, organizational and product naming
     ● Gender-inclusive and non-discriminatory language
     ● Social media and platform-specific writing 
     ● Terminology and frequently used vocabulary
     ● Tone of voice


On Artificial Intelligence

As organizations begin incorporating AI into drafting and editing workflows, it is useful to have a style guide address the matter directly, because AI can introduce the same kinds of inconsistencies and reputational risks that were meant to be prevented in the first place. A guide that clearly explains how AI should be used can help ensure that gains in efficiency do not come at the expense of accuracy, consistency or a coherent voice. It would also be beneficial to determine whether there are any issues with the AI models in use concerning claims on the ownership of generated materials or limitations on rights and publication, especially with regard to original research and institution-specific materials.

It may also be helpful to point out to colleagues that AI can be used as a support in writing but that it is not a substitute for editorial judgment. AI-assisted texts still need to be reviewed, which is why many organizations prefer to have that done by an in-house or contract editor before publication to make sure the final copy reflects the standards and voice that the style guide is meant to protect.

An in-house style guide is one of the most efficient ways for an organization to improve the quality and consistency of its communications. It creates a common standard, assists internal teams and external contributors, and it ensures that publications represent the organization's level of professionalism. It is especially important for multinational organizations to provide publication guidance in an environment where numerous English standards, writers and audiences intersect.

Organizations do not need a style guide because language must be monitored. They need one because using clear, consistent language saves time, avoids inconsistencies and maintains the confidence of the target audience. A well-designed guide collates hundreds of editorial decisions that might otherwise be made without a common standard, thereby ensuring that the organization's voice is not left to chance.

With that in mind, it is important to consider the benefits of hiring a professional copyeditor or proofreader to assist with the development of a style guide. An experienced editor can condense countless rules into a tailored manual, ensuring that language quality is built into the process and not just applied in the final stage. In this regard, a style guide is more than just a set of editorial decisions – it is a practical investment in an organization's future.