localisation of text in GX results

[smcl]

Is your feature request related to a problem? Please describe.
We use GX validation in a number of locales - Netherlands, Sweden, Germany, Finland etc. Currently all of the text relating to the results - for example what is generated by each expectation's _prescriptive_renderer - is exclusively in English. Ideally this kind of stuff can be localized so that non-English-speaking users can work with the results.

Describe the solution you'd like
This is a tough one because it could be fairly large and touches quite a few things. Taking a very specific couple of lines from the GX codebase though, we'd ideally not have code like this (from the _prescriptive_template method of the ExpectColumnDistinctValuesToBeInSet class here):

    if renderer_configuration.include_column_name:
        template_str = f"$column distinct values must belong to this set: {value_set_str}."
    else:
        template_str = f"distinct values must belong to this set: {value_set_str}."

So for text that should end up being output and visible to users we shouldn't really have English-language string literals but rather we'd have a set of localisations somewhere that we'd return using some utility function

    if renderer_configuration.include_column_name:
        template_str = self.localized_template(locale, "column_distinct_values_must_belong_to_set", column, value_set_str)
    else:
        template_str = self.localized_template(locale, "distinct_values_must_belong_to_set", value_set_str)

Obviously this is just a hacked together example but I hope it is clear what I mean - we'd use a function or method that would identify, based on the current locale and a string identifier, find a string template into which the supplied *args would be inserted.

Describe alternatives you've considered
Our alternative in this case would be to produce all required localisations outside of GX, discard all text GX provides and just sort of hack it together. This is sort of manageable but I do not believe we are the only ones who operate in locales where English is not the main language. So if a dozen other orgs do the same, that's a lot of additional repeated effort. Additionally it's potentially a reason some may elect not to use GX.

Additional context
n/a

[tyler-hoffman]

Hey @smcl , we're interested in getting a solution here. We will be spending some time thinking about the best implementation, and will share it out more when we get things more concrete, but the high level is something like this:

• We'd build out the ability to add localized renderers, but would leave it up to the community to implement them for the expectations/languages that they
• When no localized renderers are available, we'll fall back to English
  How does something like that sound to you? Would you be willing to contribute to the repo for the translations you need? Our hope is that it'd be easier on your side than hacking something together.