Not all products are imported

I tried to import products from wordpress to Shopify with your free software. The total number of products is 2650, but only 1800 were imported and then there was an error. Also, many products were imported to Shopify without photos.
After that, I deleted all the products from Shopify and bought the premium version of your plugin. I created a new application in Shopify and got the API keys. I enabled import again, but only about 600 products were imported and that was it. Please help me to start importing again and have all products added with photos. I need to import all products + metafields.
Also another question. The site is in Ukrainian, but there is an added translation into English. Can I use the products in English as import products?