app.py

import streamlit as st
import langcodes

# https://huggingface.co/blog/streamlit-spaces
langtext = st.text_area("language code", "en")
lang = langcodes.Language.get(langtext)
  



if langcodes.tag_is_valid('langtext'):
  st.write(f"'{langtext}' is a valid BCP-47 language code")  
  
else:
  st.write(f"'{langtext}' is not a valid BCP-47 language code")  
  if lang.is_valid() == False:
    try:
      found = langcodes.find(langtext)
      lang = found
    except LookupError as e:
      st.write(f"Couldn't look up langtext, sorry: {e}")
      lang = None
  

#st.write(f"langcodes found the following tag: {type(found)}") # a Language object
display = lang.display_name()

st.write(f"langcodes found the following tag: {lang}")
st.write(f"Display name for {lang}: {display}")