Fan patch 1.28 supports 2 languages (English and Russian). For example play the Russian mod "Ultimate 10" and chose the "English" button, then automatic Russian to English (Interface, monsters, items, spell, facts...). If the new content items or monster, it will not be translated into another language. Therefore, it is necessary to create a localization to add texts to the database.
If the original is English with the "English" button selected from the "Wizardry 8 Fan-Patch 1.28 Select language" window. And if the original is English with the "Russian" button selected, then English will be translated into Russian.
If you don't believe "fan patch compatibility English", then watch the video www.youtube.com/watch?v=g_lT-rhBcZA