As part of the cross-wiki search results new functionality, we'll need to figure out how best to show 'did you mean' search result recommendations:

• the "did you mean" (DYM) recommendations could become weird as terms from different indexes mingle, e.g.:
  • non-travel related terms (like "Einstein") could be suggested in wikivoyage
  • wikispecies has a lot of Latin and Latinized terms that may not be suggested anymore
  • or, in the other direction, could contaminate other projects
• if we can set up a test instance of the multi-project index:
  • could run recent queries with DYM suggestions and see how many get different suggestions
• more generally, anything based on "common" terms or inverse document frequency may be skewed by having merged indexes
  • i.e.: document scoring, spelling suggestions
• can maybe work around this:
  • use special field per wiki suggest.wiktionary
  • would this take longer or use more server resources - to search differently for each project?