[FR] Ability to localize Lovelace in a more deep way

Hi,

I’m using HA not only at my home; many friends saw it and wanted help to implement at their houses.
Unfortunately I noticed that some elements, mainly unit of measurement, are usually hardcoded in English.

Would like to have the ability translate them.

Suggestion is to have, for most common and standard units the translations directly in HA core.
For others, would be nice to have a way to get current language and use this variable in variable_template so that everything can be localized.

BTW, there is also a issue related to trnaslation; I reported it here

Looking forward for your view and suggestions.

Simone