Translate

pip install googletrans

from googletrans import Translator
translator = Translator()
translator.translate('안녕하세요.').text
translator.translate('안녕하세요.', dest='ja')

Language detection

googletrans

from googletrans import Translator
translator.detect('veritas lux mea').lang

Langdetect

pip install langdetect

from langdetect import detect
detect("War doesn't show who's right, just who's left.")
detect("Ein, zwei, drei, vier")