Add Spanish translations (#3833)
Add Spanish translations (#3833)

Added a couple of missing Spanish localized texts
JabRef/jabref,JabRef/jabref,sauliusg/jabref,sauliusg/jabref,zellerdev/jabref,JabRef/jabref,Siedlerchr/jabref,tobiasdiez/jabref,JabRef/jabref,sauliusg/jabref,Siedlerchr/jabref,Siedlerchr/jabref,tobiasdiez/jabref,zellerdev/jabref,zellerdev/jabref,sauliusg/jabref,tobiasdiez/jabref,tobiasdiez/jabref,zellerdev/jabref,Siedlerchr/jabref,zellerdev/jabref