PERMALINK problems! Link to product pages in secondary language are not correct

Our ecommerce site can be seen here:

For this product, you’ll see the page in Turkish.

Turkish
Category Page: https://organik-ekspres.com/kategori/meyveler/
Product Page: https://organik-ekspres.com/urun/cilek/

English
https://organik-ekspres.com/en/product/cilek/

URL structure is totally random. It’s using /product/product_id sometimes and other times using /urun/product_id for others.

How do we make sure permalinks are unique and setup correctly in each language?