From 8ffb99ceac334169c3d1faa3442a1a9c3460b5e6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hakan=20=C3=96zdemir?= <ozdemir@gmail.com>
Date: Thu, 23 Apr 2026 11:27:51 +0300
Subject: [PATCH] Add BCP 47 redirects for non-standard MediaWiki language
 codes
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MediaWiki core maps several non-standard wiki language codes to
standard BCP 47 codes in HTML lang= attributes (via LanguageCode.php).
The Universal Language Selector reads these lang attributes but cannot
find the BCP 47 codes in the language database, causing those languages
to be silently dropped from the Vector 2022 language sidebar.

Add redirects for the 4 missing BCP 47 codes:
- jv-x-bms -> map-bms (Basa Banyumasan)
- nap-x-tara -> roa-tara (Tarandíne)
- nrf -> nrm (Nouormand)
- ro-cyrl-md -> mo (Moldovan)

Bug: T391575
---
 data/langdb.yaml        |  4 ++++
 data/language-data.json | 26 +++++++++++++++++++++++++-
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/data/langdb.yaml b/data/langdb.yaml
index a2acc46b..1121cbb0 100644
--- a/data/langdb.yaml
+++ b/data/langdb.yaml
@@ -392,6 +392,7 @@ languages:
   jv: [Latn, [AS, PA], Jawa]
  # For support in webfonts.
   jv-java: [Java, [AS, PA], ꦗꦮ]
+  jv-x-bms: [map-bms]
   ka: [Geor, [EU], ქართული]
   kaa: [Latn, [AS], Qaraqalpaqsha]
  # Can also be Tfng, but the Wikipedia is mostly Latn
@@ -565,6 +566,7 @@ languages:
   nan-latn-pehoeji: [Latn, [AS], Bân-lâm-gí (Pe̍h-ōe-jī)]
   nan-latn-tailo: [Latn, [AS], Bân-lâm-gí (Tâi-lô)]
   nap: [Latn, [EU], Napulitano]
+  nap-x-tara: [roa-tara]
   naq: [Latn, [AF], Khoekhoegowab]
   nb: [Latn, [EU], norsk (bokmål)]
   nd: [Latn, [AF], siNdebele saseNyakatho]
@@ -592,6 +594,7 @@ languages:
   npi: [ne]
   nqo: [Nkoo, [AF], ߒߞߏ]
   nr: [Latn, [AF], isiNdebele seSewula]
+  nrf: [nrm]
   nrf-gg: [Latn, [EU], Guernésiais]
   nrf-je: [Latn, [EU], Jèrriais]
   nrm: [Latn, [EU], Nouormand]
@@ -689,6 +692,7 @@ languages:
   rmy: [Latn, [EU], Romani]
   rn: [Latn, [AF], ikirundi]
   ro: [Latn, [EU], română]
+  ro-cyrl-md: [mo]
   roa-rup: [rup]
   roa-tara: [Latn, [EU], tarandíne]
   rsk: [Cyrl, [EU], руски]
diff --git a/data/language-data.json b/data/language-data.json
index 92184496..078e59e4 100644
--- a/data/language-data.json
+++ b/data/language-data.json
@@ -2472,6 +2472,9 @@
             ],
             "ꦗꦮ"
         ],
+        "jv-x-bms": [
+            "map-bms"
+        ],
         "ka": [
             "Geor",
             [
@@ -3617,6 +3620,9 @@
             ],
             "Napulitano"
         ],
+        "nap-x-tara": [
+            "roa-tara"
+        ],
         "naq": [
             "Latn",
             [
@@ -3797,6 +3803,9 @@
             ],
             "isiNdebele seSewula"
         ],
+        "nrf": [
+            "nrm"
+        ],
         "nrf-gg": [
             "Latn",
             [
@@ -4414,6 +4423,9 @@
             ],
             "română"
         ],
+        "ro-cyrl-md": [
+            "mo"
+        ],
         "roa-rup": [
             "rup"
         ],
@@ -7421,7 +7433,19 @@
             "en",
             "zh",
             "ms",
+            "nan",
             "ta",
+            "hak",
+            "tl",
+            "yue",
+            "id",
+            "jv",
+            "bn",
+            "cdo",
+            "th",
+            "ja",
+            "cpx",
+            "mad",
             "ml",
             "pa"
         ],
@@ -7767,5 +7791,5 @@
             "tn"
         ]
     },
-    "version": "2026-04-15T14:20:00+00:00"
+    "version": "2026-04-23T08:24:56+00:00"
 }