Change language only for specific areas

I have a WordPress site in Hebrew, with different articles. There is one category named “English articles” with, well, English articles.

There are different places in there that are still in Hebrew, since the site is in Hebrew, like the comments section, and the sidebars.

I didn’t find any way to change the site language only for specific category/page/post…

Anyone know a solution?

Note: I don’t want to use any language switcher plugin for this.