Split from T130579.
- Go to a language where non-default MT was enabled recently (e.g. Swahili or Basque), and where you haven't tried it yet.
- Start translating an article from English to that language. Click a paragraph. The inserted paragraph will be in English, as expected.
- The green "with new options" label appears in the MT card, as expected.
- Click the MT engine selection dropdown (labeled "Use source text"). Select "Use Yandex" in the dropdown.
Observed: The dropdown still says "Use source text".
Expected: "Use Yandex".