Japanese speakers
Mistake: Pronouncing every letter as "KAPPU OBU TII" with three separated words and a hard b in "of".
Why: Katakana English preserves every syllable; the reduction to "cuppa" is not marked in spelling.
Fix: "Cup of" collapses to [ˈkʌpə] ("cuppa") in casual speech: [ˈkʌpə ˈtiː]. The p of "cup" links to a schwa (the reduced "of"), and "tea" follows. Say "cuppa tea" — one common British request.
Korean speakers
Mistake: Producing a clear aspirated [p] release and full [ʌv] for "of", giving "KEUP OBEU TI".
Why: Korean ㅍ carries aspiration and Korean orthography maps directly to sound.
Fix: "Of" reduces to a schwa attached to the previous consonant: [ˈkʌpə ˈtiː]. The p becomes softer, the v disappears, the o becomes schwa. This is casual English, and it is standard.
Spanish speakers
Mistake: Producing a clean [v] for "of" and adding an initial [e] before "tea".
Why: Spanish v is bilabial, and Spanish avoids initial consonant clusters that might trigger epenthesis.
Fix: "Of" fully reduces to schwa: [ˈkʌpə]. And "tea" starts with a clean [t]: [ˈtiː]. The whole phrase = [ˈkʌpə ˈtiː].