Can't change the language of my forum's display

Hello.

I just create a forum, and it display some words in english and other in thai (surely because I'm in Thailand).

I want only english and I change the language in the general admin, general settings tab, but there's no effect.

In fact I tried to change it to many other languages without any effect at all.

I don't understand how to do. If someone have the same problem and can help me. Thank you.

You can change your language in the user control panel as well. Are you sure that you've set English as your language under your profile?

If the words that are not changing are images, you will need to replace them with images that are in English.

Ok. Thank you for the response.

I just found the answer connecting from another computer. Before I login the forum was all in english, after I log, it change to thai.

It was the profile language. I change it and everything is ok.

Thank you.