I think your user agent is doing the translation, but "ecology" is a weird word choice in the original(?) English version too.

There is a language picker on the site which seems to give these translations. I'm also not 100% sure if the English version was the original version either, or at least it would explain some of the word choices if it wasn't.

It's static. There's a dropdown near bottom left to switch back to en-US. Looks like most of non-English versions are machine translated, except not all from the same singular version.