The spoken language has mostly developed naturally from earlier forms of Finnish, and spread from main cultural and political centres. The standard language, however, has always been a consciously constructed medium for literature. It preserves grammatical patterns that have mostly vanished from the colloquial varieties and, as its main application is writing, it features complex syntactic patterns that are not easy to handle when used in speech. The spoken language develops significantly faster, and the grammatical and phonological simplifications include also the most common pronouns and suffixes, which sum up to frequent but modest differences.