Seems like a token gesture then, especially considering:
> Many companies require Finnish and public sector employees must master both.
So "declaring the city English-speaking" is pointless unless the city actually implements English as an official language, providing legal and civic support for English on all official matters.
Seems like streamlining bureaucracy and reviewing the tax code would do more good, but of course it's much more involved than adjusting branding.
(I am utterly uninformed in all matters Finland, for all I know Helsinki could already have such support and I do not know it, in that case, good for them and this is effectively a good move!)