[Plugin: WordPress SEO by Yoast] Translate "Page X of Y"

I do not understand your issue, please clarify with as much detail as possible.

I used %%page%% (Replaced with the current page number (i.e. page 2 of 4)) in meta titles.

But it was in english. I want to translate it.

You can change it in /wp-content/plugins/wordpress-seo/inc/wpseo-functions.php on line #156.

Thank you!