Update README

Author: mwjames

README.md

@@ -98,7 +98,7 @@ Page:FooBar
 
 - The page content language is preset with the language annotated by `INTERLANGUAGELINK` together with an auto-updated sitelink navigation for pages that point to the same `interlanguage reference`.
 - The following predefined properties `Page content language`, `Interlanguage reference`, `Interwiki language`, `Interwiki reference`, and `Has interlanguage link` can be used to create customized `#ask` queries (e.g `Has interlanguage link.Page content language`).
-- SIL provides a `by Language` `Special:Search` filtering option to match interlanguage property annotations for pre-selected pages. If the `by Language` profile (or the advanced profile) is used together with a specific language filter then any pre-selected article (provided by the `SearchEngine`) that does not match the language will be excluded from the result list.
+- SIL provides a `by Language` `Special:Search` filtering option to match interlanguage property annotations for pre-selected pages. If the `by Language` profile (or the advanced profile) is used together with a specific language filter then any pre-selected article (provided by the `SearchEngine`) that does not match the language will be excluded from the result list. It may be necessary to broaden the limit before a match can be found because SIL does only compare languages against pre-selected results (it does not search by itself).
 - If a category page contains a `Page content language` annotation, SIL will filter and display only pages that match that content language. In cases where no language has been assigned (or filtering has been disabled), the category page will display all pages without changes or filtering.
 - In cases where an interwiki language link (e.g `[[en:Foo]]`) is added to a page (representing a non-local link, see also [`wgInterwikiMagic`][iwlm] or [`wgExtraInterlanguageLinkPrefixes`][iwlp]), SIL will create an additional `Has interlanguage link` entry (internally being identified by something like `Foo#iwl.en`). The interwiki information will not be available for any language filter (search, category).