Capitalising Made-Up Words in Fantasy and Sci-Fi Writing

Capitalising made-up words in fantasy novels – when is it necessary? And when is it problematic? Many of the authors I work with find it tricky to decide which words deserve a capital letter.

When you’re building a world full of invented cultures, magic systems, creatures and political structures, it’s tempting to capitalise everything that feels Important.

But the truth is that using too many capital letters can make your prose look very cluttered, and it frequently brings emphasis to the wrong words.

So how do you decide when an invented word in your story should be capitalised?

A surprisingly useful trick is to imagine your fantasy language has been translated into ordinary English.

If the English version would normally have a capital letter, then your invented word probably should too.

If it wouldn’t, then you should probably leave it lower-case.

The “translated into English” test

When readers encounter unfamiliar terminology, they rely heavily on context. Capitalisation helps signal whether something is a proper noun – a specific place, title or group – or just a general concept.

A good rule of thumb is to ask yourself: “If this was a normal English word, would it be capitalised?”

For example:

• The Order of the Silver Star – yes, because it’s a specific organisation.
• Queen Alara – yes, because it’s a title used with a name.
• the northern kingdoms – probably not, unless it’s an official political entity called the Northern Kingdoms.
• magic – no, because it’s a general concept.

Now apply that to invented terms.

If you create the word thalren to mean a type of magical energy, it probably shouldn’t be capitalised.

But if the Thalren are a specific religious order devoted to that energy, then capitalising the group name would make sense.

In other words, the rule isn’t about whether a word is invented. It’s about what role it plays in the sentence.

A common capitalisation mistake

Here’s the kind of sentence you often see in early drafts of fantasy novels:

Kael drew on the Ancient Power of the Eldren Flame as the Guardians of the Crystal Path prepared to defend the Western Gate from the Shadow Beasts.

Nearly every concept has been capitalised. The result is visually cluttered and difficult to follow.

Readers start wondering whether each capitalised word represents something specific they should remember – and this in turn increases cognitive load which will slow them down. Effectively, it’s a barrier to reader enjoyment.

A cleaner version might look like this:

Kael drew on the ancient power of the Eldren Flame as the guardians of the Crystal Path prepared to defend the western gate from the shadow beasts.

Now only the genuinely specific terms remain capitalised.

You might even reduce it further, depending on how those terms function in the story.

Why using too many capitals hurts your writing

Over-capitalisation causes several problems.

1. It creates visual noise. A page filled with capitalised nouns looks dense and intimidating, especially for readers who are still learning your world’s terminology.
   
   
2. It confuses hierarchy. Capital letters signal importance. If everything is capitalised, readers can’t easily tell which terms actually matter.
   
   
3. It breaks immersion. Instead of smoothly absorbing the story, your readers will stop to wonder whether a capitalised word is a Proper Thing that they need to remember. In other words, using too many capitals accidentally turns your prose into a glossary.
   
   
4. It’s quite shouty! When I read in my head, I read capitalised words more loudly. Which means a Sentence With A Lot of Capitals Ends up Being quite Shouty.
   

Fantasy readers are used to new vocabulary. What they need is clarity, not constant signalling that a word is special.

When capitalising made-up words does make sense

Capital letters are useful when they indicate something that’s clearly defined or unique within the world.

Common examples include:

• Named organisations
• Official titles when used with names
• Specific places
• Historical events
• Cultural or ethnic groups

For instance:

• the Council of Nine
• High Marshal Ren
• the Ashen Desert
• the War of Broken Crowns
• the Valeri

These follow the same patterns already used in everyday English.

If your world has a king, that’s lower-case.

If it’s King Ardan, that’s capitalised.

Your invented terminology should behave the same way.

Capitalising made-up words in fantasy and science fiction: A simple rule

When deciding whether to capitalise an invented word, ask yourself three quick questions:

1. Is this a specific, unique thing rather than a general concept?
2. Would the English equivalent normally be capitalised?
3. Will capitalisation help readers understand the hierarchy of my world?

If the answer to those questions is no, leave the word lower-case.

Your readers don’t need capital letters to know your world is important. The story will convince them of that far more effectively.

And ironically, the fewer capital letters you use, the more powerful the remaining ones become.

In fantasy writing, restraint often makes your worldbuilding feel more real – not less.

Still confused about capitalising made-up words in fantasy and science fiction novels? Please get in touch – I’d be delighted to help.