Update app.py

app.py

@@ -71,7 +71,7 @@ def translate(text,lang):
     translated = text
 
     try:
-        src_lang = html.xpath('//span[@class="source-language"]')[0].text_content().strip()
+        src_lang = html.xpath('//span[@class="source-language"]/span')[0].text_content().strip()
         trgt_lang = html.xpath('//span[@class="target-language"]')[0].text_content().strip()
         src_text = html.xpath('//pre[@id="tw-source-text"]/span')[0].text_content().strip()
         trgt_text = html.xpath('//pre[@id="tw-target-text"]/span')[0].text_content().strip()