All of our themes include language files with the file ending .pot
The language files for CityLister are located in citylister/languages/citylister.pot
The .pot file is a list of all text lines used within the theme files in English. This makes it easy to be able to translate our theme into other languages.
Loco Translate Plugin
We recommend using the Loco Translate plugin to translate your theme - https://en-au.wordpress.org/plugins/loco-translate/
To translate your theme into your language, I recommend following a YouTube tutorial to do so, for example this is a good tutorial which shows you how to use the Loco Translate Plugin: https://www.youtube.com/watch?v=3Fohy96uSzY