Each of the four bibliographies uses its target language (Catalan, Spanish, Portuguese / Galician) not only for data but also for descriptive text. Similarly, each of the four bibliographies follows the bibliographical conventions peculiar to its own scholarly tradition.
However, in order to make PhiloBiblon as helpful as possible to the greatest number of users, all of the web pages have been made available in Catalan, English, Galician, Portuguese, and Spanish.
PhiloBiblon uses the Unicode UTF-8 standard, as well as some specialized encodings based on Unicode, both for the web version and the underlying Windows version.