skip translate when source equals target

Translator/translate.py

@@ -8,6 +8,9 @@ def translate(input_text: str, source: str, target='english') -> str:
     if len(input_text.strip()) == 0:
         return input_text
 
+    if source == target:
+        return input_text
+
     batch_size = 4999
     batches = []
     whitespaces = []