- Don't do it just to show off.
- Be intentional; think like the character.
- Be subtle.
It's impossible (perhaps illegal, and certainly blasphemous) to talk about fantasy languages without mentioning the Godfather of Fantasy Language: Mr. John Tolkien. The guy was a language nut. He invented languages for fun since he was thirteen years old. If this is you, you probably don't need to read the rest of this post. You're fine.
Most of us, however, did not specialize in graduate-level English philology. Most of us speak only one or two languages with any kind of fluency. So most of us don't really understand how language evolves or what it takes to create an artificial language that has the feel and depth of a real one. That's why a lot of amateur fantasy languages sound silly or made-up; it's obvious that they are (made-up, that is).
So how do you create a language that FEELS real, without spending years determining phonology, grammar, or how the presence of two palatal fricative dates back to the Second Age when the Atpians still had two tongues? I'll show you what I do. It's the same thing I do with most of my ideas: steal from real life, then obscure your sources.
Let's take the phrase "thank you." It's a common phrase, often borrowed between languages (e.g. the Japanese say "sankyu" as borrowed English; in California we say "gracias" as borrowed Spanish, etc.).
STEAL FROM REAL LIFE. First I need a source -- some existing, real-world language I can base my fantasy language on. I want it to be somewhat obscure, and I want to show you how you can do this without even knowing the source language (which means no Thai), so I'll pick Malay.
There's lots of ways to find foreign words in a chosen language. If I wanted to be accurate, I'd use 2-3 sites to verify, but I'm making up a language, so Google Translate it is. It translates "thank you" as "terima kasih."
Now that's pretty cool on its own. It's pretty, easy to read, and sounds totally foreign. But despite the odds, somebody who speaks Malay will probably read my novel at some point and scoff. So it's time to obscure. Two ways I typically obscure source languages are: (1) alter the letters/sounds/word order of the existing phrase and (2) mix it with some other language. I'll do both.
OBSCURE YOUR SOURCES. For my second source language, I'll pick something from the same family in the hopes it will make my made-up language sound more real. A little Wikipediage tells me Malay is an Austronesian language, and lists the major languages of that branch. I'll use Filipino (just because it's also in Google Translate) and get "salamat."
Then I mish-mash for prettiness and obfuscation. Salamat + terima = salima or salama or, slightly more obscure, sarama. For kasih, I already used the "sala" part of salamat, so I'll take mat + kasih = matak. "Sarama matak." But that feels a bit long for a thank you phrase, so I'll shorten it to "Sarama tak."
And there you go. It was a little work, but a lot less work than it took to invent Quenya, I'll tell you that. If I'm really serious about this fantasy culture/language, I'll keep a glossary of the phrases I make up in my notes, along with a note of what the source languages are (so I can repeat the process to create more phrases that sound like they could be from the same language) and links to the translation sites I used.
If the glossary gets big enough, I might (because I am a bit of a language geek) start converting the phrases into their constituent parts: individual words, verbs, maybe even conjugations. But that's breaching into Tolkien territory where I said I wouldn't go. Besides which, that would tempt me to break the rules I set forth at the top of this post; they still apply even to made up languages.
So now you know my secret. Now go forth and make cool-sounding languages. Sarama tak.