Just started to use Vivaldi: Great! But among all the languages available, I see basque, gallego, sardu... but, unless mistaken, not Catalan, spoken by over 7 mllion people. Is there any reason why you do not include catalan?
Which version are you using? I am using 1.3.582.3 (Developer Build) (32-bit) on Windows 10 and it seems to be available for the GUI
Or do you mean the spell-check language?
Even more languages are available for spell-check, and Catalan is included.