In the US, those extra numbers were largely used to encode additional symbols, like mathematical notation, graphical elements, and common accented characters.
" Fight for you" ? This voice was thickly accented. Sigorn, the young Magnar of Thenn, spoke the Common Tongue haltingly at best. " Not fight for you. Kill you better. Kill all you" .
A King's River Indian told me that they call him " Pillillooeet, " which, rapidly pronounced with the first syllable heavily accented, is not unlike the lusty exclamation he utters on his way up a tree when excited.