Fix template text extraction for Lang, Native name, and Nihongo templates (#828)

## Problem
Templates like `{{lang|nap|Abbrùzzu}}` and `{{Nihongo2|東京都}}` in Wikipedia infoboxes 
were not being extracted, resulting in missing text content in DBpedia.

## Root Cause
The `Lang` template was configured to extract parameter 3, but `{{lang}}` only has 2 parameters.
Additionally, `Native name`, `Nihongo`, and `Nihongo2` templates were not configured.

## Fix
Updated [templatetransform.json](cci:7://file:///c:/Users/Vaibhav%20Mishra/gsoc2026/prr5/extraction-framework/core/src/main/resources/templatetransform.json:0:0-0:0):
- **Lang**: Extract param 2 (was incorrectly param 3)
- **Native name|native_name**: Added - extracts param 2
- **Nihongo2**: Added - extracts param 1
- **Nihongo**: Added - extracts param 2

## Examples
| Template | Before | After |
|----------|--------|-------|
| `{{lang\|nap\|Abbrùzzu}}` | *(empty)* | Abbrùzzu |
| `{{Nihongo2\|東京都}}` | *(empty)* | 東京都 |

Author: vaibhav45sktech

core/src/main/resources/templatetransform.json

@@ -30,7 +30,31 @@
     },
     "Lang":{
       "transformer":"textNode",
-      "replace": "<br />$(3||)<br />"
+      "replace": "$(2||)"
+    },
+    "Native name|native_name":{
+      "transformer":"textNode",
+      "replace": "$(2||)"
+    },
+    "Nihongo2":{
+      "transformer":"textNode",
+      "replace": "$(1||)"
+    },
+    "Nihongo":{
+      "transformer":"textNode",
+      "replace": "$(2||)"
+    },
+    "Langx":{
+      "transformer":"textNode",
+      "replace": "$(2||)"
+    },
+    "Script":{
+      "transformer":"textNode",
+      "replace": "$(2||)"
+    },
+    "Transliteration":{
+      "transformer":"textNode",
+      "replace": "$(2||)"
     },
     "Marriage":{
       "transformer":"extractChildren",

core/src/test/scala/org/dbpedia/extraction/wikiparser/TemplateTransformParserTest.scala

@@ -53,6 +53,41 @@ class TemplateTransformParserTest extends FlatSpec with Matchers
       parse("en", "{{url|https://www.dji.com DJI.com}}") should be (Some("[https://www.dji.com]"))
     }
 
+  it should "extract text from {{lang|nap|Abbrùzzu}}" in
+    {
+      parse("en", "{{lang|nap|Abbrùzzu}}") should be (Some("Abbrùzzu"))
+    }
+
+  it should "extract text from {{native name|nap|Abbrùzze}}" in
+    {
+      parse("en", "{{native name|nap|Abbrùzze}}") should be (Some("Abbrùzze"))
+    }
+
+  it should "extract text from {{Nihongo2|東京都}}" in
+    {
+      parse("en", "{{Nihongo2|東京都}}") should be (Some("東京都"))
+    }
+
+  it should "extract text from {{Nihongo|Tokyo|東京|Tōkyō}}" in
+    {
+      parse("en", "{{Nihongo|Tokyo|東京|Tōkyō}}") should be (Some("東京"))
+    }
+
+  it should "extract text from {{Script|Arab|أبجدية عربية}}" in
+    {
+      parse("en", "{{Script|Arab|أبجدية عربية}}") should be (Some("أبجدية عربية"))
+    }
+
+  it should "extract text from {{Transliteration|ru|Moskva}}" in
+    {
+      parse("en", "{{Transliteration|ru|Moskva}}") should be (Some("Moskva"))
+    }
+
+  it should "extract text from {{Langx|ja|東京}}" in
+    {
+      parse("en", "{{Langx|ja|東京}}") should be (Some("東京"))
+    }
+
 
   private val wikiParser = WikiParser.getInstance()