I am not completely familiar with the Translate extension but it appears that something you did to the Template:Sandbox heading template is causing <translate></translate> tags to show on the Sandbox pages. Please look into it when you get the chance.
Topic on User talk:Anton
The issue has now been fixed so that tags should not appear on the Sandbox page (or at least I don't see them). I completely removed the possibility of its translation from that template. Now all you have to do is delete the subpages (/fi) and (/en) that came when I translated into Finnish. Thanks.
Thank you for resolving the issue quickly, although I cannot delete those pages myself as I do not have the rights to do so. You'll have to delete them yourself or ask someone else to.
Cheers!
I know, and I'm doing it right now (I just do not understand why they do not leave). I want to remind you that if you want, you can request sysop permissions on the TestWiki:Request permissions page.
I am aware of the process to request permissions, I just do not need them at the moment! Thanks for deleting those pages, also. I will mark this topic as resolved.
Wow, so appear. I'm looking at it now. Thank you so much for the announcement! If I can't fix it, I'll return it to normal without translations.