How to translate the theme of Safira site to OpenCart version 3.0.3.1?

Question

opencart

On the site, you need to make 2 languages ​​Russian and Ukrainian, but there is a lot of text in English, how to translate the site in general? I haven't come across this before, so I'm asking for help from the experts.
And another question:
Navigation, and the side menu instead of the correct names shows this

. What is the reason?
Can the theme itself be customized in the PlazaThemes Dashboard? Or how to fix it?

Answer 1

You need to edit the files in catalog/language .
1. Copy for example en-gb, change the name to the desired language and translate.
2. Add a new language in the admin panel.