This mod parses BBCode in Custom Profile Fields. Works in both ViewTopic and ViewProfile.
phpBB Version(s): 3.0.11
Download | View Install File
Example:

[EN] Note: Do not need translations.
[PT] Nota: Não precisa de traduções.
[ES] Nota: No hay necesidad de traducciones.
[FR] Noter: Pas besoin de traductions.