With this plugin you can have a text in multiple languages. Easy to use, no requirements.
You may overwork the readme and also the other texts... that would be great.
If you have ideas/bugs please contact me.
The package also contains an version for PHP5.3+. The file is functional identical to the other one (which only requires PHP 5.2) but makes usage of a nice new feature and is easier to read/write.
When WordPress requires PHP5.3+ (sometime in the future) that file will be used.