How to translate the Theme?
The right way for translating theme or plugin, or even WordPress, is
not to translate strings directly in your theme/plugin files. After
update every file will be overwritten with a new version of it and all
changes are lost. That's simply the way the update is done (for any
theme, plugin or WordPress).
Translation is handled using .po files, the one which holds theme strings that needs to be translated is: ubergrid/langauges/ubergrid.po
Here is official 'Translating WordPress" page: http://codex.wordpress.org/Translating_WordPress
Document may look a little bit long and confusing, but the process is really simple and describes to proper way to localize your WordPress and theme .
If you have any problems with translation send us a private message or an email and we'll guide you through.