Alguien

algú

pron. somebody; someone, anyone

= anybody, anyone, one, somebody, someone.
Ex: An authority file that is not accessible to anybody is only a limited authority file.
Ex: Anyone using LC copy and the AACR is well aware of the stimulating challenges provided by superimposed headings.
Ex: None of these labels is entirely accurate, in that some packages which one would want to include in this category do not match one or other of these labels.
Ex: I know very little about the cataloging in Germany, and I trust that there is somebody in this audience who knows more than I do.
Ex: Someone familiar with the terminology of the subject that the index covers will find the index easy to use.
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* alguien que no es especialista = non-specialist [nonspecialist].
* matar a alguien = take + life.

jemand;irgendwer;irgendeiner

 pron indef 1) някой; 2) разг. важна клечка.