Customize > Woocommerce > Product Catalog > Products per row.
To translate theme you can with the help of Locotranslation plugin https://xstore.helpscoutdocs.com/article/30-base-theme-translation
For currency and language switcher :
If you want to get multi language site you need special plugins – WPML (paid) or one of the free plugins – qTranslate, Polylang. To get currency switcher you should use either WooCommerce WPML (if you choose WPML plugin) or WooCommerce Currency switcher plugin
Regards
