Does WordPress have text variables?

Question

CMS

Actually a question. does WordPress have built-in variables to display built-in words like "read more", etc. Similar to text_ variables in opencart. I am making a multilingual site and they are needed)

Answer 1

There is
https://codex.wordpress.org/I18n_for_WordPress_Dev...
https://ru.wordpress.org/plugins/tags/i18n

Answer 2

__( 'Comment: ' );
For the Russian language, it will return " Comment: ", all words can be viewed in the wp-content/languages ​​folder