Download Event Gallery.
ACE is web based code editing tool which provides a ton of editing functionality as well as supported languages. In addition you're able to use different themes for syntax highlighting. If you currently use the out of the box Joomla plain text editor this ACE integration might be worth looking at.
Event Gallery ships with an English and a German translation. Sometimes people send over translation files for different languages. I can't bundle them with Event Gallery but I'll add them to this section so everybody can benefit.
Please note that I will not provide any support for those files. Do never add those files directly into the components folder. They'll get removed with every update.
Please read this article to get familiar how to use language files correctly: Customize Language Files