diff --git a/i18n/en.json b/i18n/en.json
new file mode 100644
index 0000000..50dfa0e
--- /dev/null
+++ b/i18n/en.json
@@ -0,0 +1,3 @@
+{
+  "open_in": "open in "
+}
diff --git a/i18n/it.js b/i18n/it.js
deleted file mode 100644
index e69de29..0000000
diff --git a/i18n/it.json b/i18n/it.json
new file mode 100644
index 0000000..752283a
--- /dev/null
+++ b/i18n/it.json
@@ -0,0 +1,3 @@
+{
+  "open_in": "apri con "
+}
diff --git a/mailgo.d.ts b/mailgo.d.ts
index dc7beb8..db9f8cd 100644
--- a/mailgo.d.ts
+++ b/mailgo.d.ts
@@ -4,6 +4,7 @@
 
 export type MailgoConfig = {
   initEvent?: string;
+  lang?: string;
   // TODO here mailgo configurations!
 };