Excellent suggestion! I've added it to our to-do list for JFBConnect v6.2.
In the meantime, you can force the language right now by editing the /components/com_jfbconnect/libraries/provider/linkedin.php file. Around line 99, you'll see:
$initJs = "IN.init({\n" .
"api_key: '" . $this->appId . "',\n" .
'authorize: false' . "\n" .
'});';Update that to:
$initJs = "IN.init({\n" .
"lang: pt_BR,\n" .
"api_key: '" . $this->appId . "',\n" .
'authorize: false' . "\n" .
'});';The other language codes, for reference, can be found:
developer.linkedin.com/documents/sign-linkedin
I hope that helps,
Alex