***because of poverty most of them unable to be qualified thats why more then (Spelling error it has to be THAN) half of eithopis(Spelling error ETHIOPIANS) are labour (spelling error change this to LABORS)

But trust me there is no fake engineering or bcs certificate and the professionals are well organised and structured. Even the labors they work as much as they can and that's what counts.

***Very cheap labours according to other nationalities.
Yes, but the rate is same as any other 3rd world nationalities.

***bad thing among them is lake of cleanliness.
Trust me they are clean... but artificial look is not acceptable by the society that's the problem, actually its not a problem but its what you are offered from God.

*** dont know any language except their own.
Me and my friends we do understand at least 3 languages. Even the labors will learn Arabic in a matter of weeks.

***I also met 1 eithopi who is marketing executive in real estate instead of labour..
Try a little bit more and you will find thousands of Engineers, Executives etc... not only in Qatar but in the middle east and the rest of the world.

Cheers Peace and Blessing...