On the Cover Art → Processing options page, the "Resize" and "Convert" sections place the Tags and Files sub-group-boxes side by side in a horizontal layout. Each group box only gets ~half the page width, so its title is truncated with longer translations (e.g. French) or on small screens, for example "Redimensionner les images enregistrées dans les balises".
  
This is a symptom of the general non-wrapping issue tracked in PICARD-3447, but can be addressed independently for this page by stacking the Tags and Files group boxes vertically (each spanning the full page width), so the titles fit without truncation. This avoids the need for custom wrapping widgets and is a clean, contained change.