How to change locale to English?

Question

I have message from bash and it's localized, I want English message, my locale is:

$ locale
LANG=pl_PL.UTF-8
LANGUAGE=pl:en
LC_CTYPE="pl_PL.UTF-8"
LC_NUMERIC=pl_PL.UTF-8
LC_TIME=pl_PL.UTF-8
LC_COLLATE="pl_PL.UTF-8"
LC_MONETARY=pl_PL.UTF-8
LC_MESSAGES="pl_PL.UTF-8"
LC_PAPER=pl_PL.UTF-8
LC_NAME=pl_PL.UTF-8
LC_ADDRESS=pl_PL.UTF-8
LC_TELEPHONE=pl_PL.UTF-8
LC_MEASUREMENT=pl_PL.UTF-8
LC_IDENTIFICATION=pl_PL.UTF-8
LC_ALL=

I've try:

LANG=en_US.UTF-8; type grunt
LC_ALL=en_US.UTF-8; type grunt
LC_MESSAGES=en_EN.UTF-8 && type grunt
export LC_MESSAGES=en_US.UTF-8; type grunt 

But the message keep showing up in Polish:

ścieżka do grunt jest zapamiętana (/usr/local/bin/grunt)

How can I make this text English?

EDIT

I've run:

$ eval $(locale | sed -e 's/\(.*\)=.*/export \1=en_US.UTF-8/')             
$ locale
LANG=en_US.UTF-8
LANGUAGE=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=en_US.UTF-8

and type grunt show polish message.

Answer 1

The problem is your semicolon/&&. The way you're doing it, the shell is executing your assignment as a separate command. Thus, type is never seeing it. Do it this way instead:

LC_ALL=en_US.UTF-8 type grunt

This tells your shell to temporarily set the environment variable LC_ALL=en_US.UTF-8, execute type, then reset LC_ALL to whatever it was before.