“Read more” button

Under Appearance → Customize → Extra CSS (Utseende → Anpassa → Extra CSS) you can add, for instance:

.blogpost-button {
    font-family: "Times New Roman";
}

It looks as if the theme didn’t do correct preparations for translation of some parts.
The function definition for personalblogily_numeric_posts_nav() doesn’t call any translation functions. Therefore this string isn’t available for translation.

Here’s a quick and dirty CSS fix for this. Insert the following via Utseende → Anpassa → Extra CSS:

.next.page-numbers::after {
    content: 'Nästa';
    font-size: initial;
}
.next.page-numbers {
    font-size: 0;
}
.prev.page-numbers::after {
    content: 'Föregående';
    font-size: initial;
}
.prev.page-numbers {
    font-size: 0;
}

When the theme developer fixes this, then it’s better that you remove these fixes.

By the way: If you’ve made a Swedish translation of this theme, then you could upload it at https://translate.wordpress.org/projects/wp-themes/personalblogily/sv/default/ there’s an import link at the bottom of the page. Once I or any of my fellow GTE’s (General Translation Editors) for Swedish verifies the translation, it will automatically be distributed to any other Swedish users of this theme.