Vulgar constructs languages for fantasy fiction or whatever other purpose you can imagine, applying consistent rules to the custom phonemes you feed it. [via]
Vulgar's output models the regularities, irregularities and quirks of real world languages; phonology, grammar, and a 2000 unique word vocabulary. Trial the demo version online. Purchase the premium version to get access to the complete 2000 word output (with derivational words) and extra grammatical rules. …
Vulgar generates … based on a list of some of English's most common words. However, the program is more than just a one-to-one mapping of unique outputs to English words. In an effort to mimic real world languages, Vulgar also creates various homphones and overlapping senses inspired by examples from real world languages. For example:
Here's my language:
The Language of Puput /ˈpʰupʰutʰ/
…and he stood holding his hat and turned his wet face to the wind.
…u lu bunela une luch yafa u neba luch miku peb tul ye
Pronunciation: /u lu bɯˈnela ˈune løtʃ ˈjafa u ˈneba løtʃ ˈmikʰø pʰeb t̪øl je/
Narrow pronunciation: [u lu bɯˈnela ˈune løtʃ ˈjafa u ˈneba løtʃ ˈmikʰø pʰe t̪øl je]
Puput structure: and he stood holding his hat and turned his wet face the wind to
Seed for this language: 0.36384689368800394
The Puput word for "stuff" is "nut." I'll spare you details of the nominative and accusative case forms, but they're there. The full edition of the app is $20.