JPA - Join another entity by EmbeddedId with 2 columns - spring

Question

Basically. I have a ProductEntity, like this:
#Entity
#Table(name = "product", schema = "shop")
public class ShopProductEntity {
#EmbeddedId
private ProductEntityId id;
#Column(name = "product_name")
private String name;
#Column(name = "product_category_id")
private int categoryId;
#Column(name = "product_language_id")
private int languageId;
// TODO: Get category by categoryId and languageId.
private CategoryEntity category;
I have another CategoryIdentity:
#Entity
#Table(name = "category", schema = "shop")
public class CategoryEntity {
#EmbeddedId
private CategoryEntityId id;
#Column(name = "category_name")
private String name;
#Column(name = "category_url")
private String url;
It has an EmbeddedId like this:
#Embeddable
public class CategoryEntityId implements Serializable {
#Column(name = "category_id", nullable = false)
private int categoryId;
#Column(name = "language_id", nullable = false)
private int languageId;
public int getCategoryId() {
return categoryId;
}
public int getLanguageId() {
return languageId;
}
Now, every product has a category. Categories are unique by their id and language. The shop connects to a category by both the categoryId and languageId columns. How do I add the CategoryEntity to my ProductEntity so I can use the category's url value for my product?
I tried adding this to ShopProductEntity:
#ManyToOne
#JoinColumns({
#JoinColumn(name="categoryId", referencedColumnName="categoryId"),
#JoinColumn(name="languageId", referencedColumnName="languageId"),
})
private CategoryEntity category;