To make my previous posts easier to understand, here are all the common temperature formats and which ones work/don't work (test for yourself):
21 °C or 21°C or 21° C ✅
21 C or 21C ❌
21 Celsius or 21Celsius ❌ (also other conversions don't work if you write out the full units instead of the abbreviation, like 21 kilometers per hour vs. 21 km/h)
21° ❌
It's kind of a limited feature if only one format works.
Absolutely!
The Snapshot and the Easy Setup buttons are a eyesore! Why do functions that will be used very rarely need to be permanently in my adress bar?
I will never understand these design decisions. Just give us a toogle to hide them, for god's sake.
Well, it's not an instantaneous translation like the feature you're suggesting would be, but the "Translator" extension on the front page of Opera's extensions site acts quite similar to what you're suggesting (https://addons.opera.com/en/extensions/details/translator/).
If you highlight a block of text, all you have to do is click on the Translator icon in your toolbar and it will automatically paste in the text, auto-detect the language, and translate it for you. It's actually quite good. So like I mentioned, it's not instantaneous translation like you want but it's really only one quick extra step.