extra_english.lang Not Working

[Zaffre]

Hello. I recently posted about how my stories weren't showing up, but that's sorted out. Here's my error: the extra_english.lang isn't working. I've tried editing it, but to no avail. Here are my scripts; I followed them from a video, as I'm new to coding. It could just be my ignorance.

01_tutorial.hps (the main map):

Spoiler below!

void OnStart()
{
SetLocalVarInt("DoorLocked", 1);
AddUseItemCallback("", "key_study_1", "level_wood_1", "FUNCTION", true);
AddUseItemCallback("", "key_study_2", "mansion_1", "FUNCTION2", true);
SetEntityPlayerInteractCallback("mansion_1", "FUNCTION3", false);
}

void OnEnter()
{

}

void OnLeave()
{

}
void FUNCTION(string &in item, string &in door)
{
SetLevelDoorLocked("level_wood_1", false);
PlayGuiSound("unlock_door.snt", 100);
RemoveItem("key_study_1");
}
void FUNCTION2(string &in item, string &in door)
{
SetSwingDoorLocked("mansion_1", false, true);
PlayGuiSound("unlock_door.snt", 100);
RemoveItem("key_study_2");
SetLocalVarInt("DoorLocked", 0);
}
void FUNCTION3(string &in entity)
{
if(GetLocalVarInt("DoorLocked") == 1)
{
SetMessage("Messages", "doorlock2", 3);
}
}

custom_story_settings.cfg:

Spoiler below!

<Main
Name="Testing Story"
Author="Zaffre"
ImgFile="preview.jpg"

StartMap="01_tutorial.map"
StartPos="PlayerStartArea_1"
/>

extra_english.lang:

Spoiler below!

<LANGUAGE>
<RESOURCES>
</RESOURCES>

<CATEGORY Name="CustomStoryMain">
<Entry Name="Description>Testing grounds.</Entry>

</CATEGORY>

<CATEGORY Name="Messages">
<Entry Name="doorlock1">The heavy door is locked.</entry>
<Entry Name="doorlock2">The wooden door is locked.</entry>

</CATEGORY>

<CATEGORY Name="Inventory">
<Entry Name="ItemDesc_key1>A silver key coated with rust.</Entry>
<Entry Name="ItemName_key1>Rusty Key</Entry>
<Entry Name="ItemDesc_key2>A silver key. It looks new.</Entry>
<Entry Name="ItemName_key2>Silver Key</Entry>
</CATEGORY>

</LANGUAGE>

Additional Info: I have two keys. Their custom IDs are key1 an key2. The tutorial series is made by XXVengeanceFilmsXX on YouTube. Thanks in advance.