can run it now

src/initializers/view_engine.rs

@@ -9,7 +9,10 @@ use loco_rs::{
 use tracing::info;
 
 const I18N_DIR: &str = "assets/i18n";
-const I18N_SHARED: &str = "assets/i18n/shared.ftl";
+// Kept outside `I18N_DIR`: fluent-templates >=0.13 scans top-level *.ftl files
+// in that dir as locales, and "shared" parses as a langid, so a shared.ftl
+// living there would be loaded twice and fail with a duplicate-resource error.
+const I18N_SHARED: &str = "assets/i18n_shared/shared.ftl";
 #[allow(clippy::module_name_repetitions)]
 pub struct ViewEngineInitializer;