curl --location --request POST '/api/language/switch?session_id=sess_123456789&target_language=ja-JP&auto_retranslate=true'
{
"code": 200,
"message": "Target language updated successfully",
"data": {
"session_id": "sess_123456789",
"previous_language": "en-US",
"current_language": "ja-JP",
"retranslated_text": "こんにちは"
}
}