you will get only key values here. You can check in the report if ${object.state} value is 'xxx' , then you can print XXX

You can simply add a method and call it like this ( the code is not tested):

@api.one

def get_sale_state(self):

     state_list = {'draft': 'Quotation', ...}

    return state_list[self.state]

And in your email template call it as usual:

${object.get_sale_state()}

Not sure on how to get the field_val. But a workaround could be using if statements
<code>
% if object.state in ('draft'):  draft

% endif % if object.state in ('paid'):  paid

% endif
</code>

Something like this should work. Although the only if statements in mail templates i could find at this moment are checking if the variables are set. But I figure this would work. I couldn't test this, as my mailserver on my testenv is not configured