You need to determine exactly which version you have. Navigate to your Total War Attila root folder and look for the following:

Fix: Your fonts folder is missing or corrupted. Codex cracks sometimes strip fonts to save space. Download the fonts_english.pack (commonly included in "Language Packs") and place it in data.

The term "codex patched" typically refers to a comprehensive or updated version of text files (in this case, English language files) for the game, often created or updated by the community or modders. These patches can fix typos, grammatical errors, or inconsistencies in the game's text, or even change the game's dialogue and text for modding purposes.