Because mango ends in o in English and is alive, so es is added.
Mango
Pronunciation: British [?m?ɡ?]? American [?m?ɡo?]?
Definition: Mango.
Grammar: plural mangoes, large evergreen tropical tree cultivated for its large oval fruit A large evergreen tropical tree cultivated for its oval fruit.
Example:
I?like?to?eat?peach?and?watermelon,?I?like?to?eat?mango?and?pineapple?too.
I like to eat peaches and watermelon, I also like to eat mango and pineapple. Extended information
Same root phrase: mango juice
Pronunciation: British [?m?ɡ? d?u?s]? American [?m?ɡo? d?u?s] ?
Interpretation: mango juice.
Grammar: The basic meaning of juice is "juice, liquid", which generally refers to the juice or liquid of fruits, vegetables, meat, etc. It can be used as an uncountable noun or as a countable noun.
Example:
We have fresh orange juice, apple juice, watermelon juice, and mango juice.
Our freshly squeezed juices include orange juice, apple juice, watermelon juice, and mango juice.