Poedit is a common program that you can use to translate the theme. It’s available for free on poedit.net.
After you have installed Poedit, you can open it and select File -> Open. Then select the “vaincode.pot” file from the theme you wish to translate, which you can find in the “languages” folder of the Vaincode theme.
Then go through every line of text and translate it to your native language. Afterward, you can save it as the catalog with your language code (for example es_ES.po) File > Save as. Normally Poedit automatically creates the .mo file and saves it, too.
The last step you have to do is upload your created language files to the “languages” folder of the Vaincode theme using FTP.