-Added: Slash commans /lzt or /transz:
Enter a zone name afterwards (in your client language) or choose it from the autocompletion list.
Press tab or space to chose the zonename, and you'll see another auto completion which will provide you the translations of this zone to other languages.
Chosing an entry will put the translated zone name into the chat.

-Added slash commands to search in your desired language:
/lztde or /transzde: German
/lzten or /transzen: English
/lztfr or /transzfr: French
/lztjp or /transzjp: Japanese
/lztru or /transzru: Russian
/lztpl or /transzpl: Polish

* GetMapInfo(*luaindex* _index_)
** _Returns:_ *string* _name_, *[UIMapType|#UIMapType]* _mapType_, *[MapContentType|#MapContentType]* _mapContentType_, *integer* _zoneId_, *string* _description_

* GetGuildMemberCharacterInfo(*integer* _guildId_, *luaindex* _memberIndex_)
** _Returns:_ *bool* _hasCharacter_, *string* _characterName_, *string* _zoneName_, *integer* _classType_, *integer* _alliance_, *integer* _level_, *integer* _championRank_, *integer* _zoneId_

* GetFriendCharacterInfo(*luaindex* _friendIndex_)
** _Returns:_ *bool* _hasCharacter_, *string* _characterName_, *string* _zoneName_, *integer* _classType_, *integer* _alliance_, *integer* _level_, *integer* _championRank_, *integer* _zoneId_

* GetCurrentMapZoneIndex()
** _Returns:_ *luaindex* _zoneIndex_

* GetZoneIndex(*integer* _zoneId_)
** _Returns:_ *luaindex* _zoneIndex_

local libZone = LibStub('LibZone')

--Check and get all zone's data and save them to the SavedVariables
--Parameters:
-->reBuildNew: Boolean [true=Rebuild the zoneData for all zones, even if they already exist / false=Skip already existing zoneIds]
-->doReloadUI: Boolean [true=If at least one zoneId was added/updated, do a ReloadUI() at the end to update the SavaedVariables now / false=No autoamtic ReloadUI()]
function lib:GetAllZoneDataById(reBuildNew, doReloadUI)

--Return the zoneData of a zone, determined by help of the subZone ID.
--Parameters:
--subZoneId: Number SubZoneId
--language: String Language for the ParentZoneName
-->Returns table:
--->returnTable[number SubZoneId] = {
--->    ["parentZoneId"] = number ParentZoneId,
--->    ["name]"         = String "ParentZoneName"
--->}
--If no parent zone can be found the return value will be nil.
function lib:GetZoneDataBySubZone(subZoneId, language)

--Return existing zone/their subZone data to variables.
-- Returns the zoneData, subZoneData tables
-->Contents of zoneData:
-->zoneData = { ["name"] = String "Zone Name^n"
-->             ["zoneIndex"] = number zoneIndex
-- }
-->Contents of subZoneData:
-->subZoneData = { ["name"] = String "Sub zone Name^n"
-->                ["parentZone"] = number zoneId}
-- }
function lib:GetZoneData(zoneId, subZoneId, language)

--Show existing zone data to the chat now
--Output zone informtaion to the chat, using the zoneId, subZoneId (connected to zoneId via parentZoneId) and the language (e.g. "en" or "fr")
function lib:ShowZoneData(zoneId, subZoneId, language)

--Get the localized zone name by help of a zoneId
--zoneId: Number containing zoneId
--language: The language to use for the zoneName
--->Returns localized String of the zoneName
function lib:GetZoneName(zoneId, language)

--Get the localized zone names by help of a table containing the zoneIds
-->zoneIdsTable: Table containing a number index as key and the zoneId as value
-->e.g. zoneIdsTable = {2, 3, 36, 1200} or zoneIdsTable[1] = 1, zoneIdsTable[2] = 3, zoneIdsTable[3] = 36, zoneIdsTable[4] = 1200
--->Returns table containing the zone names
--->Key = zoneId
--->Value = table with the zoneData from the SavedVariables.
--->Example:
---->returnTable[2] = "Clean Test"
---->returnTable[3] = "Gelnumbra"
function lib:GetZoneNamesByIds(zoneIdsTable, language)

--Get the localized zone data by help of a table containing the zoneIds
-->zoneIdsTable: Table containing a number index as key and the zoneId as value
-->e.g. zoneIdsTable = {2, 3, 36, 1200} or zoneIdsTable[1] = 1, zoneIdsTable[2] = 3, zoneIdsTable[3] = 36, zoneIdsTable[4] = 1200
--->Returns table containing the zoneData
--->Key = zoneId
--->Value = table with the zoneData from the SavedVariables.
--->Example:
---->returnTable[2] = {
---->   ["name"] = "Clean Test",
---->   ["zoneIndex"] = 1,
---->},
---->returnTable[3] = {
---->   ["name"] = "Glenumbra",
---->   ["zoneIndex"] = 2,
---->}
function lib:GetZoneDataByIds(zoneIdsTable, language)

--Get the localized zone names matching to a localized search string
-->searchStr: The String with the search value of a zone name (using searchLanguage)
-->searchLanguage: The langauge to search the searchStr variable in Format example: "en". Can be nil (<nilable>)! If the searchLangauge is nil the client language will be taken as searchLanguage.
-->returnLanguage: The language for the translated results. e.g. you search for "Ostmar" with search language "de" and the return language "en". The result will be the "Eastmarch" zone.
--->Returns table containing the zoneId as table key and the localized (in language: returnLanguage) full zone name, matching to the search string, as table value
function lib:GetZoneNameByLocalizedSearchString(searchStr, searchLanguage, returnLanguage)