Partial translations using i18n [GridView]

I have enabled i18n in my project. In development it works fine but once in deployment it doesn’t.

An example (using [font="Courier New"]GridView[/font]):

The word “Mostrando” or “Showing” is translated but I don’t know why I’m seeing the template without translation.

Other messages (confirmation messages, validation messages, etc.) are correctly translated.

PHP Version: 5.4.40

ICU Version: 3.6 (I know it’s old but I’m in a shared hosting, can’t do much about that )

Is there a way to force GridView[size="2"] to use my own translations?[/size]