diff --git a/.gitignore b/.gitignore
index 4683d71..7937363 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 .vscode/
+.idea
 # Generated by Cargo
 # will have compiled files and executables
 debug/
diff --git a/src/lib.rs b/src/lib.rs
index e43b570..5da6756 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -34,7 +34,7 @@ pub mod deepl_helper {
             let matches = App::from_yaml(yaml).get_matches();
 
             Self {
-                source_lang: matches.value_of("source").unwrap_or("DE").to_string(),
+                source_lang: matches.value_of("source").unwrap_or("0").to_string(),
                 target_lang: matches.value_of("target").unwrap_or("EN-US").to_string(),
                 file: matches.value_of("file").unwrap_or_default().to_string(),
                 key: env::var("key").unwrap(),
@@ -48,14 +48,20 @@ pub mod deepl_helper {
         }
 
         pub fn body(&self) -> String {
-            sprintf!(
-                "auth_key=%s&text=%s&target_lang=%s&source_lang=%s",
+            let mut body = sprintf!(
+                "auth_key=%s&text=%s&target_lang=%s",
                 self.key,
                 self.text,
-                self.target_lang,
-                self.source_lang
+                self.target_lang
             )
-            .unwrap()
+            .unwrap();
+
+            if self.source_lang != "0" {
+                let add = sprintf!("&source_lang=%s", self.source_lang).unwrap();
+                body.push_str(&add);
+            }
+
+            body
         }
     }