Help translate 5 sentences

1. Cultural diversity has not reduced prejudice and discrimination against immigrants from southern Europe and Asia.

2. Cultural differences may contribute to the tension between different races and undermine the unity between countries.

3. Most leaders and representatives of ethnic minorities are men and the bourgeoisie, and they are basically unable to speak for the rights of women and the working class.

4. Those immigrants from southern Europe, eastern Europe and the Middle East are always engaged in lower-level jobs.

Some work certificates of those immigrants, such as doctors and accountants, are not recognized in Australia, so they can't do these jobs.