Naturally only good translators will be useful. I would not expect nothing less from Calibre users.
Note: I do not manage the translations site (its Kovid I assume), I was only making a request for more users to be involved so the number of translations for the site interface will be higher.
Lets face it: languages like german / arabic (on the missing ones) are required in any site.
There are also some languages that could be available in the website if actual translators could spend one hour of work with this single file (they have lots of translations done for the software interface): Turkish, Dutch, Polish, Greek, Korean, Malay, Serbian, Indonesian, Japanese, Swedish, Catalan, Hungarian
So in this Covid-19 time, does anybody have some time to spare and do some work on the "Website" translation file??
https://www.transifex.com/calibre/calibre/website/
Go for the easy ones (single words /menus / titles)!