ERROR: JavaScript error: gui/reference/common/TemplateLoader.js line 91 
0 is read-only
 loadTechnologyTemplate@gui/reference/common/TemplateLoader.js:91:30
 findAllAutoResearchedTechs@gui/reference/common/TemplateLoader.js:197:20
 TemplateLoader@gui/reference/common/TemplateLoader.js:18:36 ReferencePage@gui/reference/common/ReferencePage.js:10:25 StructreePage@gui/reference/structree/StructreePage.js:10:3
 init@gui/reference/structree/structree.js:8:11 onPress@gui/pregame/MainMenuItems.js:35:13 
performButtonAction@gui/pregame/MainMenuItemHandler.js:77:9 pressButton@gui/pregame/MainMenuItemHandler.js:63:10

This commit now has outstanding concerns.May 3 2021, 3:25 PM

Looked at a similar check in TemplateParser.js
This code should solve the error

--- a/binaries/data/mods/public/gui/reference/common/TemplateLoader.js
+++ b/binaries/data/mods/public/gui/reference/common/TemplateLoader.js
@@ -88,7 +88,8 @@ class TemplateLoader
 
                        // Translate specificName as in GetTechnologyData() from gui/session/session.js
                        for (let civ in data.specificName)
-                               data.specificName[civ] = translate(data.specificName[civ]);
+                               if (data.specificName[civ)
+                                       data.specificName[civ] = translate(data.specificName[civ]);
 
                        this.technologyData[templateName] = data;
                }

Upload it as a separate patch?

You could make another diff :)
Would that translate the specific name though in the above files?

In rP25332#51242, @Stan wrote:

You could make another diff :)

Would that translate the specific name though in the above files?

No. There is a separate block of code for translating "SpecificName" as simple string:

TemplateLoader.prototype.TechnologyTranslateKeys = ["genericName", "tooltip", "description"];
...
translateObjectKeys(data, this.TechnologyTranslateKeys);

If this functionality is needed, I can test it at the same time

In rP25332#51246, @nwtour wrote:

If this functionality is needed, I can test it at the same time

As noted on IRC today, the example json are incorrect, however being able to translate normal strings (instead of objects) seems to be nice. So up to you :)

nwtour mentioned this in D3921: Fix JavaScript error: gui/reference/common/TemplateLoader.js line 91 rP25332.May 3 2021, 5:18 PM

In rP25332#51247, @Stan wrote:

As noted on IRC today, the example json are incorrect, however being able to translate normal strings (instead of objects) seems to be nice.

Now "Plain String" is not displayed at all (Not even translated text, see screenshot in https://code.wildfiregames.com/D3921).