LogFAQs > #973946994

The main problem is that 8 had voice acting, so the various accents they used in that game were only apparent vocally. In text they weren't that prominent.

But DQIV had no voices, so in order to get the same idea across they wrote the script to have them heavily appear phonetically, and used very strong accents to push it more. This simply doesn't work as well in text form. Luckily the translations of the games they did later handled this MUCH better.