True but that's a diphthong, "jo" is just a long(ish) o vowel sound. A lot of English dialects simply don't have an equivalent sound so it's hard to spell it. I

True but that's a diphthong, "jo" is just a long(ish) o vowel sound. A lot of English dialects simply don't have an equivalent sound so it's hard to spell it. It's the IPA "o" or close to it. In my accent (south East England) "your" is pronounced almost identically to "jo".