Haha, I'm wondering how much people on german p-server translate quest_complete_texts parallel and manually :-)
But the quest_template_locale table contains a lot of field names from an earlier core version.
Actually the relations are:
quest_template:LogDescription - quest_template_locale:Objectives
quest_template:AreaDescription - quest_template_locale:EndText
quest_template:QuestDescription - quest_template_locale:Details
quest_template:ObjectiveText1 - quest_template_locale:ObjectiveText1
quest_template:ObjectiveText2 - quest_template_locale:ObjectiveText2
quest_template:ObjectiveText3 - quest_template_locale:ObjectiveText3
quest_template:ObjectiveText4 - quest_template_locale:ObjectiveText4
quest_template:QuestCompletionLog - quest_template_locale:CompletedText
quest_requested_items:CompletionText - quest_template_locale:RequestedItemsText
quest_offer_reward:RewardText - quest_template_locale:OfferRewardText
May it helps, otherwise please make an example of a quest.