Hi,

We recommend to use Loco Translate plugin for the theme translation or you can translate theme manually with .po file, pls. follow the instructions: 

1. Take file languages/thegem.pot or xx_YY.po from theme directory.

2. Open this file with Poedit software.

3. Translate necessary strings to your language.

4. In software open Catalog - Settings and set Language to Translation to xx_YY.

5. Then save the file as thegem-xx_YY. (You must have two files thegem-xx_YY.po and thegem-xx_YY.mo.)

6. These files you need to put to the wp-content/languages/themes of your site.

With the same operation, you can translate TheGem elements plugin.

Just put  translations in wp-content/languages/plugins