diff --git a/binaries/data/mods/public/gui/civinfo/civinfo.js b/binaries/data/mods/public/gui/civinfo/civinfo.js
index 07491bc04b..21228b2949 100644
--- a/binaries/data/mods/public/gui/civinfo/civinfo.js
+++ b/binaries/data/mods/public/gui/civinfo/civinfo.js
@@ -1,7 +1,7 @@
 /**
- * Load playable civs.
+ * Display selectable civs only.
  */
-const g_CivData = loadCivData(true);
+const g_CivData = loadCivData(true, false);
 
 /**
  * Initialize the dropdown containing all the available civs.
diff --git a/binaries/data/mods/public/gui/common/functions_civinfo.js b/binaries/data/mods/public/gui/common/functions_civinfo.js
index 9e9f1ca54a..bb4f01bf51 100644
--- a/binaries/data/mods/public/gui/common/functions_civinfo.js
+++ b/binaries/data/mods/public/gui/common/functions_civinfo.js
@@ -3,15 +3,16 @@
  *
  *  @param selectableOnly {boolean} - Only load those which can be selected
  *         in the gamesetup. Scenario maps might set non-selectable civs.
+ *  @param gaia {boolean} - Whether to include gaia as a mock civ.
  */
-function loadCivData(selectableOnly = false)
+function loadCivData(selectableOnly, gaia)
 {
-	var civData = {};
-	var civFiles = Engine.BuildDirEntList("simulation/data/civs/", "*.json", false);
+	let civData = {};
+	let civFiles = Engine.BuildDirEntList("simulation/data/civs/", "*.json", false);
 
 	for (let filename of civFiles)
 	{
-		var data = Engine.ReadJSONFile(filename);
+		let data = Engine.ReadJSONFile(filename);
 		if (!data)
 			continue;
 
@@ -26,5 +27,8 @@ function loadCivData(selectableOnly = false)
 				error(filename + " doesn't contain " + prop);
 	}
 
+	if (gaia)
+		civData.gaia = { "Code": "gaia", "Name": translate("Gaia") };
+
 	return civData;
 }
diff --git a/binaries/data/mods/public/gui/gamesetup/gamesetup.js b/binaries/data/mods/public/gui/gamesetup/gamesetup.js
index 8b1869df8e..f73c51b82d 100644
--- a/binaries/data/mods/public/gui/gamesetup/gamesetup.js
+++ b/binaries/data/mods/public/gui/gamesetup/gamesetup.js
@@ -10,6 +10,12 @@ const g_StartingResources = prepareForDropdown(g_Settings && g_Settings.Starting
 const g_VictoryConditions = prepareForDropdown(g_Settings && g_Settings.VictoryConditions);
 const g_VictoryDurations = prepareForDropdown(g_Settings && g_Settings.VictoryDurations);
 
+/**
+ * Offer users to select playable civs only.
+ * Load unselectable civs as they could appear in scenario maps.
+ */
+const g_CivData = loadCivData(false, false);
+
 /**
  * Highlight the "random" dropdownlist item.
  */
@@ -56,12 +62,6 @@ var g_PlayerTeamList = prepareForDropdown([{
 	)
 );
 
-/**
- * Offer users to select playable civs only.
- * Load unselectable civs as they could appear in scenario maps.
- */
-var g_CivData = loadCivData();
-
 /**
  * Number of relics: [1, ..., NumCivs]
  */
diff --git a/binaries/data/mods/public/gui/reference/common/core.js b/binaries/data/mods/public/gui/reference/common/core.js
index 18c5508305..0d0ffe8ca7 100644
--- a/binaries/data/mods/public/gui/reference/common/core.js
+++ b/binaries/data/mods/public/gui/reference/common/core.js
@@ -1,14 +1,6 @@
 var g_SelectedCiv = "";
 var g_CallbackSet = false;
 
-/**
- * Initialises civ data. Not done automatically in case a page doesn't want it.
- */
-function init_civs()
-{
-	g_CivData = loadCivData(true);
-}
-
 function closePage()
 {
 	if (g_CallbackSet)
diff --git a/binaries/data/mods/public/gui/reference/common/load.js b/binaries/data/mods/public/gui/reference/common/load.js
index 0dab63ac6e..aadec1480e 100644
--- a/binaries/data/mods/public/gui/reference/common/load.js
+++ b/binaries/data/mods/public/gui/reference/common/load.js
@@ -8,9 +8,9 @@ const g_AuraPath = "simulation/data/auras/";
  * Raw Data Caches.
  */
 var g_AuraData = {};
-var g_CivData = {};
 var g_TemplateData = {};
 var g_TechnologyData = {};
+var g_CivData = loadCivData(true, false);
 
 /**
  * Parsed Data Stores.
diff --git a/binaries/data/mods/public/gui/reference/structree/structree.js b/binaries/data/mods/public/gui/reference/structree/structree.js
index 867f1d1fc7..cde4e4ce7f 100644
--- a/binaries/data/mods/public/gui/reference/structree/structree.js
+++ b/binaries/data/mods/public/gui/reference/structree/structree.js
@@ -18,8 +18,6 @@ function init(data = {})
 	if (data.callback)
 		g_CallbackSet = true;
 
-	init_civs();
-
 	let civList = Object.keys(g_CivData).map(civ => ({
 		"name": g_CivData[civ].Name,
 		"code": civ,
diff --git a/binaries/data/mods/public/gui/replaymenu/replay_menu.js b/binaries/data/mods/public/gui/replaymenu/replay_menu.js
index b98d19df86..9998a8010b 100644
--- a/binaries/data/mods/public/gui/replaymenu/replay_menu.js
+++ b/binaries/data/mods/public/gui/replaymenu/replay_menu.js
@@ -6,7 +6,7 @@ const g_EngineInfo = Engine.GetEngineInfo();
 /**
  * Needed for formatPlayerInfo to show the player civs in the details.
  */
-const g_CivData = loadCivData();
+const g_CivData = loadCivData(false, false);
 
 /**
  * Used for creating the mapsize filter.
diff --git a/binaries/data/mods/public/gui/savedgames/load.js b/binaries/data/mods/public/gui/savedgames/load.js
index 197d2e88be..afd0cb73d5 100644
--- a/binaries/data/mods/public/gui/savedgames/load.js
+++ b/binaries/data/mods/public/gui/savedgames/load.js
@@ -3,7 +3,7 @@ var g_SavedGamesMetadata = [];
 /**
  * Needed for formatPlayerInfo to show the player civs in the details.
  */
-const g_CivData = loadCivData();
+const g_CivData = loadCivData(false, false);
 
 function init()
 {
diff --git a/binaries/data/mods/public/gui/session/session.js b/binaries/data/mods/public/gui/session/session.js
index 67e65e66cd..0c10a349ba 100644
--- a/binaries/data/mods/public/gui/session/session.js
+++ b/binaries/data/mods/public/gui/session/session.js
@@ -1,5 +1,7 @@
 const g_IsReplay = Engine.IsVisualReplay();
 
+const g_CivData = loadCivData(false, true);
+
 const g_Ceasefire = prepareForDropdown(g_Settings && g_Settings.Ceasefire);
 const g_GameSpeeds = prepareForDropdown(g_Settings && g_Settings.GameSpeeds.filter(speed => !speed.ReplayOnly || g_IsReplay));
 const g_MapSizes = prepareForDropdown(g_Settings && g_Settings.MapSizes);
@@ -103,11 +105,6 @@ var g_LastTickTime = Date.now();
  */
 const g_StatusBarUpdate = 200;
 
-/**
- * Not constant as we add "gaia".
- */
-var g_CivData = {};
-
 /**
  * For restoring selection, order and filters when returning to the replay menu
  */
@@ -277,9 +274,6 @@ function init(initData, hotloadData)
 
 	updatePlayerData();
 
-	g_CivData = loadCivData();
-	g_CivData.gaia = { "Code": "gaia", "Name": translate("Gaia") };
-
 	g_BarterSell = g_ResourceData.GetCodes()[0];
 
 	initializeMusic(); // before changing the perspective
diff --git a/binaries/data/mods/public/gui/summary/summary.js b/binaries/data/mods/public/gui/summary/summary.js
index 4854869990..5ed2fcd5fe 100644
--- a/binaries/data/mods/public/gui/summary/summary.js
+++ b/binaries/data/mods/public/gui/summary/summary.js
@@ -1,3 +1,5 @@
+const g_CivData = loadCivData(false, false);
+
 const g_MaxHeadingTitle= 9;
 
 // const for filtering long collective headings
@@ -97,9 +99,11 @@ var g_SummaryTypes = {
 	}
 };
 
-const g_InfinitySymbol = "\u221E";
+/**
+ * Translation: Unicode encoded infinity symbol indicating a division by zero in the summary screen.
+ */
+var g_InfinitySymbol = translate("\u221E");
 
-var g_CivData = loadCivData();
 var g_Teams = [];
 
 // TODO set g_PlayerCount as playerCounters.length