Text speeds have yet to be fully timed, but Japanese is currently known to save ~2 minutes over English.
The European version also has French, German, Spanish, and Italian translations. Italian is currently known to be faster than English. Other languages have yet to be timed.
(Exact times will be added later)
The European version is based on an earlier build of the game and has various differences to it. The North American version is the latest of the three and fixed some glitches. The Japanese version is in between the two and is also the preferred version, as the Portal Items glitch wasn't patched and Zeffa can be called from the top of the Wind Palace unlike the European version.
EUR: Yes
JPN: Yes
USA: No
EUR: No
JPN: Yes
USA: Yes
EUR: No
JPN: Yes
USA: Yes
EUR: No
JPN: No
USA: Yes
EUR: 2
JPN: 1
USA: 1
EUR: 2
JPN: 1
USA: 1
EUR: Yes
JPN: No
USA: No
EUR: Slow
JPN: Slow
USA: Fast
EUR: Green/Red/White 100, Orange 300, Blue/Yellow 200
JPN: All 200
USA: All 200
EUR:100
JPN: 200
USA: 200
EUR: Quiet Town Fest Theme
JPN: Beanstalk Theme
USA: Beanstalk Theme