Japanese speakers
Mistake: Inserting a vowel-like release after the [d] in "grand", producing something close to "gurando prize".
Why: Japanese loanword adaptation of "grand" (グランド) always adds a final vowel after [d], and that borrowed pronunciation habit transfers directly into English speech.
Fix: Drop the [d] completely and move straight from [n] to [p]: [ɡrænˈpraɪz], with "grand" ending crisply on the nasal sound.
Korean speakers
Mistake: Pronouncing the [d] as a distinct released stop before starting "prize": "gran-duh prize".
Why: Korean final consonants are usually released clearly rather than elided, so the instinct is to give every written consonant its own audible moment.
Fix: Let the [n] flow directly into the [p] of "prize" with the [d] silent: [ɡrænˈpraɪz].
Chinese speakers
Mistake: Treating "grand" and "prize" as two fully separate syllabic units with a small pause, similar to how two Mandarin characters are pronounced individually.
Why: Mandarin has no equivalent to a three-consonant cluster crossing a word boundary, so learners tend to reset airflow between words rather than link them.
Fix: Practice merging the two words into a single breath group where the [d] simply disappears: [ɡrænˈpraɪz].