It would be fine as a translation option. For cases when the page is not found, or the local language is lacking so you want to translate from a different language.
It isn't a replacement for an expert writing the real page in the language though. But there are a lot of languages with very little content. German has less than half as many articles as English (Cebuano is number 2 by number of articles - but that seems fishy. German is number 3). At the bottom Cree has only 13 articles. There are also a small number of inactive wikipedias, some of which may want a translation option as better than nothing.
It isn't a replacement for an expert writing the real page in the language though. But there are a lot of languages with very little content. German has less than half as many articles as English (Cebuano is number 2 by number of articles - but that seems fishy. German is number 3). At the bottom Cree has only 13 articles. There are also a small number of inactive wikipedias, some of which may want a translation option as better than nothing.