Change language on Get Satisfaction

First of all, I recommend you to start with clearing your Google cookies, since I think it can be that Google stores your language in a cookie as well.

After your did that, head over to https://www.google.com/settings/language and select your language. Normally all Google services should be in that language by default then, but I know of some that manage languages by themselves. Like f.e. the Google Play Store.

It is not possible to change the language of Draw.io, unless you change your own computer's language setting to English, which would then change the language of Draw.io accordingly.

If this is not feasible, you can try adding a ?lang=en at the end of the URL (like https://www.draw.io/?lang=en) to force it to appear in English, but it will not remember this setting though, you would have to set it every single time you visit the site.