diff --git a/crates/ui-egui/src/app.rs b/crates/ui-egui/src/app.rs
--- a/crates/ui-egui/src/app.rs
+++ b/crates/ui-egui/src/app.rs
@@ -87,6 +87,7 @@ impl SheetApp {
 
     /// Sets up fonts and visuals for a specific persisted interface language.
     pub fn setup_context_for_language(ctx: &egui::Context, dark: bool, language: i18n::Language) {
+        crate::fonts::start_scan();
         ctx.set_fonts(theme::font_definitions_for_language(language));
         theme::apply(ctx, dark);
     }