Having only english stopwords leads to the following situation where a fuzzy match is shown but a better match is available if you ignore some non-english stopwords:
On English Wikipedia, if I type "Ruta Maya" in the search bar, the only suggestion I get is "Rita May (actress)". I'm impressed that it suggests Rita May, but confused that it doesn't suggest "La Ruta Maya" (which does get suggested at Special:Search).
Specific cases can be fixed by adding a redirect but it sounds interesting to investigate in a more generic solution by expanding the stopwords to other languages, esp. on english wikipedias where there are many non-english titles.