Steps to Reproduce:
- Go to https://www.wikidata.org/wiki/Special:NewLexeme
- Put in "amanga" as lemma
- Select "Fon language" as the language of the lexeme
- "noun" as "lexical category".
- Press the button for creating the lexeme
"The supplied language code was not recognized."
"Spelling variant of the Lemma" pops up. There we are not able to select "Fon".
The lexeme would be created.