I have have a question about how should we work with db in JPA manner when dealing with translated tables.

So, let’s assume that I have next entities:

class A {
    @Id
    @Column(name = "id", nullable = false)
    private UUID id;

    @OneToMany(mappedBy = "a")
    private Set<B> bSet = new HashSet<>();

    @OneToMany(mappedBy = "a")
    private Set<ATranslation> translations = new HashSet<>();

    \ getters and setters
}

class ATranslation {
    @Id
    @Column(name = "id", nullable = false)
    private UUID id;
    
    @ManyToOne()
    @JoinColumn(name = "a_id", nullable = false)
    private A a;

    @Column(name = "language_code")
    private String languageCode;

    @Column(name = "is_default")
    private Boolean isDefault = Boolean.FALSE;

    // Other specific fields (for example: name, title and e.t.c)
}

Class B has also own translation with specific fileds. So How can I deal with this structure? Foe example I want to get A by id with all B for specific language request and if translation for specified language does not exist I want to retreave default language. How can achive it?

Also assume that dto which I should return should looks like something this:

clas ADto {
   private UUID id;
   private String title;
   private String name;
   private Set<BDto> bDtoSet = new LinkedHashSet<>();
}