I can't find how to put things back to English. Help!

There is a few ways of fixing this.

A
Download Google Chrome and use the built in translate function

B
When logging in, pick English as language.

C
If you are already logged in, go to the todaypage and either at top or bottom on page depending on settings your will see your name. In front of your name you will see a little button, click on it and you can change language.

I mean on this forum.

Go to the startpage of frontersupport.com then you should see the language picker in top left corner. This is NOT visible when you are in the forum even if it looks like you have the same top. (Due to bad language support, you see a mixture of english and whatever language u have picked)

Many thanks

I enabled the language selector for the forum now, not expecting any issues with it. The reason for it not being available throughout the site is that not all articles are necessarily translated to all languages at all.

When it comes to language support, whenever there is something only in English and not the selected language we try to fix it (everything is first published in English), but there are some strings in the site's modules not supporting all languages - for instance the tabs on the forum (Index, Recent Topics...).