[Sunred]

The reason the Korean W Driver has localized sounds is because turns out they decided to localize the show itself(primarily the character names only). Most of the time Kamen Rider shows were hardly localized (names of characters and locations, etc...) in Korea, and it basically meant getting the original henshin belts with a cheaper price tag and translated packaging. Here is a list of the belts that have been released in Korea(note that Korea did not air Kuuga, Agito, Hibiki):

V Buckle from Ryuki(localized: none)
All belts from Faiz(localized: none)
All belts from Blade(localized: none)
All belts and zectors from Kabuto(localized: none)
All belts from Den-o(localized: K-taros and Denkamen sword)
Ixa Belt, Sagarc Belt from Kiva (localized: Kivat belt, Dark Kivat belt)
Decade henshin items(localized: none)
All belts from W(localized: All Gaia Memories are localized)

One thing to know is that rider and sentai aired in Korea is as follows:
January ~ June is Kamen Rider Season
July ~ December is Super Sentai Season

Sentai aired in Korea:
Abaranger(Power Ranger Dino Thunder)
Dekaranger(Power Ranger SPD)
Magiranger(Power Ranger Magic Force)
Boukenger(Power Ranger Treasure Force)
Gekiranger(Power Ranger Wild Spirit)
Go-onger(Power Ranger Engine Force)
Goseiger(Power Ranger Miracle Force)

Kamen Rider aired in Korea:
Ryuki(Gahmyeon Rider Dragun. Gahmyeon is the korean word for mask/kamen)
Faiz(Gahmyeon Rider Faiz)
Blade(Gahmyeon Rider Blade)
Kabuto(Gahmyeon Rider Gabuto)
Den-o(Gahmyeon Rider Den-o)
Kiva(Gahmyeon Rider Kiva)
Decade(Gahmyeon Rider Decade)
W(Gahmyeon Rider Double)

I am not sure how it will play out this year regarding Gokaiger because not all super sentai has been released in Korea under the Power Ranger franchise and certain shows (particularly Flashman, Bioman, Maskman) have been known to Koreans in their respective titles since early 1990's. The only solution for getting Gokaiger in Korea is if the localization team there justifies it in a way that makes sense (i.e. it is a parallel world), then it could go smooth.