liboktetacore - en to ja translation catalogue (4 entries)

[ctx: name of the change]
en: Insert
ja: 挿入

[ctx: name of the change]
en: Remove
ja: 削除

[ctx: name of the change]
en: Replace
ja: 置換

[ctx: name of the change]
en: Swap Ranges
ja: 範囲を交換
