Till now I don´t add a language file to this template.
There is just one word of text in it.
But I put a new version online (1.0.2) now with language support.
Install this version and you will find a /language folder in this subfolder (from your Joomla root directory):
There you can add another subfolder with another translation it it.
The default english file can be found here:
Create a new one for any language you want to support using the RFC3066 name convention.
For example for a german language file crete:
and translate the output in de-DE.tpl_minimalsquare.ini
If you don´t want to reinstall the whole template download the new version, extract it on your loacal HDD and upload the following two files and one folder via FTP to the corresponding loaction on your server (/templates/minimalsquare/ in your Joomla root directory):