Update app.py

app.py

@@ -4,10 +4,12 @@ import langcodes
 # https://huggingface.co/blog/streamlit-spaces
 langtext = st.text_input("language lookup using https://github.com/rspeer/langcodes, see also https://r12a.github.io/app-subtags/", "english")
 
+st.write("Checking whether the tag is valid. That is, the language, script, territory, and variants (if present) are all tags that have meanings assigned by IANA.")
+
 if langcodes.tag_is_valid(langtext):
-  st.write(f"{langtext} is already a valid BCP-47 language tag")
+  st.write(f"{langtext} parses meaningfully as a language tag according to IANA.")
 else:
-  st.write(f"{langtext} is not already a valid BCP-47 language tag")
+  st.write(f"{langtext} doesn't parse meaningfully as a language tag according to IANA, some of its subcomponents may be invalid or it might be a natural language description.")
     
 
 try: