Finalization of the online store

Online store on the wukomers, the theme is Royal Shop pro. Needs to be fixed:
1. Mobile menu of categories of the online store: when opening the menu, links to subcategories do not work, a whole block of upper categories is triggered
2. main page sliders: the theme involves displaying product categories in the slider on the main page. When you try to customize the slider, the selected categories are not displayed or the slider dies completely
3. Translate the topic into Russian: headings "my account", "cart", "compare", "wishlist"
4. Implement the import of goods to the site by api of the supplier
In response, send your portfolio and your price