Omniglot is a comprehensive collection of languages and writing systems, both real-world and “constructed,” and is an incredibly inspirational resource for anyone interested in adding foreign languages to their roleplaying sessions.
There is a lot here for GMs to work with, whether you’re looking to create some convincing phrases or even if you just want some nonsensical filler text – you could, for example, create some simple documents in Arabic or Ancient Aramaic for your troupe of archaeologists to find. There are even writing systems that have been developed by visitors to the site – all of them very unusual. Use Visual Binary Cube on some keyboard displays in your cyberpunk campaign. Write out a page from a crazed cultist’s journal in Bāgha. Want to burn a few real-world sanity points from your players (and maybe make them a bit nauseous to boot)? Give them something written in Rotor Script to translate – it’s a language in which all of the characters move as you’re reading them.
Just try not to get overwhelmed like I did. I may need to lie down for a bit.
(Thanks to BoingBoing for the link.)