The correct spelling of the phrase "wert foundation for" is actually "worthy foundation for". The word "worthy" is spelled with a /w/ sound followed by an /ɔː/ sound, represented by the IPA transcription /ˈwɜːrði/. This is followed by "foundation", which is simply spelled as it sounds with a /f/ sound followed by an /aʊ/ sound, transcribed as /faʊnˈdeɪʃən/. So, when combined, the correct spelling of the phrase is "worthy foundation for".