(1) Start translating en:Alice Williams by using Google translate:
The Interlanguage template will have additional space added after inserted template.
Note: Translating with Yandex/Apertium will not add extra spaces for templates, e.g.
(2) Start translating en:Truism to es - {{spaced ndash}} template will have extra spaces and Citation needed is completely missing from the target page:
Note: Translating the same paragraph with Apertium/Yandex will have indication of Citation needed missing -
(3) translating to Japanese - references have extra space added - en:Hugo Kołłątaj
translating the same article to Spanish, no extra spaces added:
A related bug was reported on Google's side.