Does Squirro Cognitive Search provide a single search of all content across time, space, and language?
Yes Squirro does provide a single search across time and space (I assume you mean different sources). Squirro can process manifold languages (most commonly used). You can search per language out of the box.
If your question would imply that you can search in one language and find information in the other languages automatically: For this to work you’d need to first translate the documents into a common language.