We are with a database 12C using character set american.america.WE8ISO8859P15 and we are trying to use the SQLDeveloper version 188.8.131.52, but since we are brazilians we need that the SQLDeveloper show all the accents, like
'ão' or words that have 'ç'. We have configured all the NLS parameters in the tool, but it didn't work. We also configured the windows chcp with the 1252 code. Finally, we configured the NLS_LANG, but didn't work still.