'¿Quien esta?' means: Who is there?
The statement 'Quin est loco' is a mix of French and Spansh words. For the adjective 'loco' needs to be written 'fou'. The corrected phrase 'Quin est fou' therefore means Quin is crazy. In the word-by-word translation, the verb 'est' means '[he/she/it] is'. And the adjective 'fou' means 'crazy'.
"Quien" means "who".
Amor est caecus translates to English to mean 'Love is Blind.'
Est means is
Comment est is translated "how is..." in English.
Le sang est ... means "the blood is ..." in English.
'she is'
Il est means "there is."
"qui est la" ==> Who is the
mon professeur est ... means my teacher is ...
he's English
"It is what it is", and that's Latin.