We have been waiting a long time.
Example: "Please excuse me for knocking. But we have been waiting for a long time now. Can you please tell me when you have time for us?" Answer: "Please be patient for a moment. I will call you then."
Wir warten schon eine ganze Weile. 
Vi har väntat väldigt länge. 
Vi har ventet længe. 
Jeg har ventet lenge. 
Olemme odottaneet jo kauan. 
Me oleme kaua oodanud. 
Mes jau labai ilgai laukiame. 
Mēs jau ilgu laiku gaidām. 
Við höfum beðið lengi.