How can I translate words that are not translated into new languages?

[w_t]

Good morning,
I installed the "beautiful" template from the store,
the template is in English, I downloaded the Romanian language, it works almost everything,
there are items of buttons or titles that are not translated, I went to the directory "\ oc-content \ languages \ ro_RO \" I opened the core.po, message.po and theme.po files, I tried to edit them adding what I need it, being careful to define the field based on the name used in the call inside the template, but then it does not work ...
The usual .mo files are encrypted and can not be edited.

Am I doing something wrong?
How do you translate untranslated items?

Thank you all.

[calinbehtuk]

https://blog.osclass.org/2014/09/05/translate-osclass-plugins-themes/

Just an example, the steps are the same for all themes
https://www.youtube.com/watch?v=Kh43uF_Yv7M

[w_t]

thank you very much, it works !!

[Ecanmadi]

I saw that I wanted to acquire it. It was very good