Secure gmail app by pin code

On my pc, when I receive mail from another language then I can translate to english in gmail site. But I cant do it on My iphone app I need this.

I need a security for gmail apps, such as pin type.
When me or someone try to open gmail apps then its need pin code or fingerprint secure my gmail.

alamgir.en about Gmail - Email by Google, v5.0.170827