diff --git a/web/src/views/contacts/ContactsSidebar.tsx b/web/src/views/contacts/ContactsSidebar.tsx
index faa738e..3ef0591 100644
--- a/web/src/views/contacts/ContactsSidebar.tsx
+++ b/web/src/views/contacts/ContactsSidebar.tsx
@@ -114,7 +114,7 @@ export function ContactsSidebar() {
           title={t("New address book")}
           aria-label={t("New address book")}
           onClick={async () => {
-            const name = await promptDialog({ title: "New address book", placeholder: "Name" });
+            const name = await promptDialog({ title: t("New address book"), placeholder: t("Name") });
             if (!name?.trim()) return;
             try {
               await contacts.createBook(name.trim());
diff --git a/web/src/views/files/FilesTree.tsx b/web/src/views/files/FilesTree.tsx
index b96fda6..9137a3d 100644
--- a/web/src/views/files/FilesTree.tsx
+++ b/web/src/views/files/FilesTree.tsx
@@ -257,7 +257,7 @@ export function FilesTree() {
               label={t("Rename")}
               disabled={!menuNode.myRights?.mayRename}
               onClick={async () => {
-                const name = await promptDialog({ title: "Rename", defaultValue: menuNode.name });
+                const name = await promptDialog({ title: t("Rename"), defaultValue: menuNode.name });
                 if (!name?.trim() || name === menuNode.name) return;
                 try {
                   await useFiles.getState().rename(menuNode.id, name.trim());
diff --git a/web/src/views/mail/MailView.tsx b/web/src/views/mail/MailView.tsx
index e34e090..3e4e896 100644
--- a/web/src/views/mail/MailView.tsx
+++ b/web/src/views/mail/MailView.tsx
@@ -228,7 +228,16 @@ export function MailView({ mailboxId, threadId, search }: { mailboxId?: string;
         const trashId = mail.roleId("trash");
         const permanent = t.every((id) => trashId && mail.emails[id]?.mailboxIds[trashId]);
         if (permanent || settings.confirmDelete) {
-          const ok = await confirmDialog({ title: permanent ? "Delete forever?" : "Delete?", message: permanent ? `${t.length} message(s) will be permanently deleted.` : `Move ${t.length} message(s) to Trash?`, confirmLabel: "Delete", danger: permanent });
+          // "message(s)" was doing the work a plural form should: every
+          // language that inflects got a parenthesis instead of agreement.
+          const ok = await confirmDialog({
+            title: permanent ? translate("Delete forever?") : translate("Delete?"),
+            message: permanent
+              ? plural(t.length, { one: "{n} message will be permanently deleted.", other: "{n} messages will be permanently deleted." })
+              : plural(t.length, { one: "Move {n} message to Trash?", other: "Move {n} messages to Trash?" }),
+            confirmLabel: translate("Delete"),
+            danger: permanent,
+          });
           if (!ok) return;
         }
         await mail.trash(t);
diff --git a/web/src/views/settings/CalendarSettings.tsx b/web/src/views/settings/CalendarSettings.tsx
index 6d073dd..78af5f8 100644
--- a/web/src/views/settings/CalendarSettings.tsx
+++ b/web/src/views/settings/CalendarSettings.tsx
@@ -60,7 +60,7 @@ export function CalendarSettings() {
           <div style={{ marginTop: 8 }}><ColorSwatches value={c.color} onChange={(col) => update({ eventCategories: s.eventCategories.map((x, j) => (j === i ? { ...x, color: col } : x)) })} /></div>
         </div>
       ))}
-      <button className="btn mb-16" onClick={async () => { const n = await promptDialog({ title: "New category", placeholder: "Name" }); if (n?.trim() && !s.eventCategories.some((c) => c.name.toLowerCase() === n.trim().toLowerCase())) update({ eventCategories: [...s.eventCategories, { name: n.trim(), color: CALENDAR_COLORS[s.eventCategories.length % CALENDAR_COLORS.length]! }] }); }}><Plus size={16} />  {t("New category")}</button>
+      <button className="btn mb-16" onClick={async () => { const n = await promptDialog({ title: t("New category"), placeholder: t("Name") }); if (n?.trim() && !s.eventCategories.some((c) => c.name.toLowerCase() === n.trim().toLowerCase())) update({ eventCategories: [...s.eventCategories, { name: n.trim(), color: CALENDAR_COLORS[s.eventCategories.length % CALENDAR_COLORS.length]! }] }); }}><Plus size={16} />  {t("New category")}</button>
 
       <h2>{t("Subscribed calendars")}</h2>
       <p className="hint" style={{ marginTop: -8 }}>