Is it possible to change the language of a game?

I see, I have a No$gba 2.6a when I add the firmware.bin the languange of some games change into Spanish. Memoy00 also have Firmware.bin in the no$gba folder, that's why I told him/her (don't know the gender) to remove it to change the language back to English.

problem solved,thanks to mr. seph,and by the way it's a HE.
thank you all

Good then, sorry for the gender thing

no prob ;D