Sinatra-r18n is a Sinatra extension that provides i18n support to translate your
web application. It is just a wrapper for R18n core library. It has nice
Ruby-style syntax, filters, flexible locales, custom loaders, translation
support for any classes, time and number localization, several user language
support, agnostic core package with out-of-box support for Rails, Sinatra and
desktop applications.