diff --git a/src/types/i18n.d.ts b/src/types/i18n.d.ts
new file mode 100644
index 0000000..43fb8aa
--- /dev/null
+++ b/src/types/i18n.d.ts
@@ -0,0 +1,8 @@
+export {}
+
+declare module 'vue' {
+  interface ComponentCustomProperties {
+    $t: (key: string, opt?: Record<string, any>) => string
+    $tm: (key: string, opt?: Record<string, any>) => [] | { [p: string]: any }
+  }
+}