HI!

1. You need to edit template 

/wp-content/themes/thegem/search.php

example of the default view you can see in the  

/wp-content/themes/thegem/index.php

for the safety update copy the file to the child theme before the editing. 

2. You can use loco translate plugin or 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

Hi, you need to edit template:

wp-content/themes/thegem/search.php

Example of the setting up  the default style you can see in the file:

/wp-content/themes/thegem/index.php

For the safety updates copy this file to the child theme