Finding un-localized strings (e.g. using pseudoloc)

[jaredkrinke]

FYI: I think the searchbox on formatjs.io is broken since it doesn't find anything when I search for "pseudo", but I eventually found (via search engine) that react-intl does in fact appear to have pseudoloc support:

https://formatjs.io/docs/tooling/cli/#--pseudo-locale-pseudolocale