This does only the last version 09, until 08 there weren’t any problems with Custom Labels. I emailed John about this a couple of weeks ago but unfortunately there hasn’t been any answer from him yet. I have a PRO version with a live support which always worked well for me but last 3 weeks my emails are just ignored. Why – I don’t know.
To change mins and hours in HTML should be always the last thing you do, after you are sure you won’t need to update the recipe again. But I think this still works on my website. It only changes my language back to English mins and hours again, after I do some changes – which is pretty normal.
John also promised a translation option some time ago – as nothing has happened I still use Custom Labels and change mins+hours in html like you do. I’m happy to wait but there is no answer from John so I don’t know what is going on.