🇺🇸 Catalog
Correct for US. This is the standard spelling in American English.
🇬🇧 Catalogue
Correct for UK/AU. This is the standard spelling in British, Canadian, and Australian English.
Writing a product list or organizing a library collection often leads to a moment of hesitation: do you write catalog or catalogue? The confusion is understandable because both spellings appear frequently on the internet. Unlike many confused word pairs where one is simply a mistake, both of these words are 100% correct. The only difference lies in where your audience is located.
If you are writing for an audience in the United States, the shorter version is the standard. If your readers are in the United Kingdom, Australia, or Canada, the longer version is preferred. They share the exact same definition: a complete list of items, typically one in alphabetical or systematic order.
The Main Difference: American vs. British English
The split between these two spellings is a classic example of the “Webster Effect.” In the early 19th century, the American lexicographer Noah Webster sought to simplify English spelling for the new nation. He removed the silent -ue endings from words like dialogue, monologue, and of course, catalog.
🇺🇸 American Usage
In the United States, catalog (ending in -g) is the dominant form. While you might occasionally see the longer version in very formal or artistic contexts (like a “museum catalogue”), it is becoming increasingly rare. Americans prefer efficiency and generally drop silent letters.
🇬🇧 British Usage
In British English (along with Canadian, Australian, and New Zealand English), catalogue (ending in -gue) retains its French and Latin roots. While the American spelling is slowly gaining traction due to the internet, the traditional spelling remains the standard for schools, businesses, and government documents.
How to Handle Verb Forms
The spelling difference extends beyond just the noun. When you use the word as a verb (the act of making a list), you must maintain the spelling convention you started with. This ensures your writing remains consistent and professional.
Grammar Note: In American English, the forms are cataloged and cataloging. In British English, they become catalogued and cataloguing. Notice how the ‘u’ stays or goes depending on the root word.
- US Example: The librarian cataloged the new arrivals yesterday.
- UK Example: The librarian catalogued the new arrivals yesterday.
- US Example: We are currently cataloging the artifacts.
- UK Example: We are currently cataloguing the artifacts.
Quick Comparison Table
Here is a breakdown of how these words change based on region and usage. Use this to quickly check your work before publishing.
| Region | Noun Form | Past Tense | Present Participle |
|---|---|---|---|
| United States | Catalog | Cataloged | Cataloging |
| United Kingdom | Catalogue | Catalogued | Cataloguing |
| Canada / Australia | Catalogue | Catalogued | Cataloguing |
Exceptions to the Rule
Language rarely follows strict rules without a few exceptions. Even if you are writing in American English, there are specific instances where you should stick to the longer catalogue spelling.
1. Proper Nouns and Titles
If a specific organization, exhibition, or historical document uses the spelling “Catalogue” in its official name, you must respect that spelling regardless of your location. For example, referencing “The Sears, Roebuck and Co. Catalogue” retains the historical spelling.
2. Computer Science (System Catalogs)
In the world of IT and database management, catalog is almost universally used, even in the UK. System files and database directories are rarely referred to as “catalogues” in code or technical documentation.
💡 Writer’s Tip
Consistency is more important than geography. If you start your article using catalog, do not switch to catalogue halfway through. Mixing spellings looks sloppy and confuses search engines.
