locale command should be . LANG=en_US.UTF-8.

My setting are .

locale 

LANG=en_AU.UTF-8

LANGUAGE=en_AU:en

LC_CTYPE="C"

LC_NUMERIC="C"

LC_TIME="C"

LC_COLLATE="C"

LC_MONETARY="C"

LC_MESSAGES="C"

LC_PAPER="C"

LC_NAME="C"

LC_ADDRESS="C"

LC_TELEPHONE="C"

LC_MEASUREMENT="C"

LC_IDENTIFICATION="C"

LC_ALL=C

local file config

   cat /etc/default/locale : 

   LANG="en_US.UTF-8"

   LANGUAGE="en_US:en"



   cat /etc/locale.conf

   LANG="en_US.UTF-8"

What I have already done.

sudo locale-gen en_US.UTF-8 : 

Generating locales...

en_US.UTF-8... up-to-date

Generation complete.



sudo dpkg-reconfigure locales

Generating locales...

  en_IN.UTF-8... done

  en_US.UTF-8... up-to-date

Generation complete.

Please Let me know if you need any thing.

I am not sure /etc/default/locale file is default or custom.