Preface their title with an article
When talking about someone
El Señor Garcia está en la oficina
Mr Garcia is in the office
Do not use an article
When talking to someone
Señor Garcia, está en la oficina?
Mr Garcia, are you in the office?
Must be repeated
Indirect object pronouns
Me, te, le, os, nos, les
Lo siento
Sorry for sympathy and regret
Disculpa/e
Sorry for small accidents or getting someone’s attention
Perdón
Sorry for both casual and serious uses
Permiso
Sorry for permission
Aun (no accent)
Means incluso (even) or hasta (up to) or también (also)
Aún (accent)
Time-based meanings (still/yet) or emphasis (e.g. aún mejor)