As long as the pronunciations are linked to symbol keys, then a mix would be fine. The intent is to add a very simple alternative to IPA. Many webpages or books use the respelled pronunciations, with just the plain letters, so that form is easy to verify and add into articles. Also, there could be added "American" or "local" pronunciations, such as:
 Halley's Comet (pr. UK: "Haul-eze", American: "Hal-eze") will return in 2062.
 Lafayette, LA (pr. "Laugh-ee-ett") is in south-central Lousiana.
 Cape Cod (pr. "Cahd", local: "Kwod") is in eastern Massachusetts.
 When a pronunciation has several variations, then the whole explanation can be placed into a footnote, listing each spoken form. -Wikid77