In my London accent “park” and “talk” do not rhyme completely. Park has the usual “ah” vowel, but talk has an “o” vowel (in southern England we would call this

In my London accent “park” and “talk” do not rhyme completely. Park has the usual “ah” vowel, but talk has an “o” vowel (in southern England we would call this an “or” vowel but I suspect that might confuse you more).