@Entity
public class Person implements Serializable {
    private int id;
           ...........
    private Set<Languages> languages = new HashSet<Languages>();
       ...............
    @ManyToMany
    @JoinTable(name = "link_person_languages")
    public Set<Languages> getLanguages() {
       return languages;
    }
}

@Entity
public class Languages implements Serializable {
    private int id;
    private String name;
    @Id
    @GeneratedValue
    public int getId() {
        return id;
    }
    @Column(nullable = false, length = 40, unique = true)
    public String getName() {
        return name;
    }

Criteria languageCriteria = session.createCriteria(Person.class);
languageCriteria.createAlias("languages","l");
criteria.add(Restrictions.in("l.name", new String[]{"English","German"}));
List<Person> matchingPeopleList = (List<Person>)languageCriteria.list();