Hello @kidphoto,

All the strings available including “Read more” in the theme are already translation ready and can be translated in any language you want.

For the translation, you can use the plugin like Loco Translate.

Link:

https://wordpress.org/plugins/loco-translate/

Now to remove the related post section, add below-given CSS by going to Admin Panel > Appearance > Customize > Additional CSS.

div#related-posts {
    display: none;
}

Hope this helps.

Regards!!