feat(linux): use display language for keyboard search

linux/keyman-config/keyman_config/downloadkeyboard.py

@@ -3,6 +3,7 @@
 import logging
 import os
 import urllib.parse
+from keyman_config.keyman_locales import find_locales
 
 import gi
 
@@ -30,7 +31,7 @@ def __init__(self, parent=None):
         self.webview = WebKit2.WebView()
         self.webview.connect("decide-policy", self._keyman_policy)
         self.webview.connect("load-changed", self._update_back_button)
-        url = KeymanComUrl + "/go/linux/" + __releaseversion__ + "/download-keyboards"
+        url = KeymanComUrl + "/go/linux/" + __releaseversion__ + "/download-keyboards" + "?lang=" + self._get_current_locale()
         self.webview.load_uri(url)
         s.add(self.webview)
 
@@ -56,6 +57,12 @@ def __init__(self, parent=None):
         self.resize(800, 450)
         self.show_all()
 
+    def _get_current_locale(self):
+        loc = find_locales()[0]
+        if loc == "C": 
+            loc = "en"
+        return loc.replace('_','-')
+
     def _update_back_button(self, webview, load_event):
         self.back_button.set_sensitive(webview.can_go_back())
 

linux/keyman-config/keyman_config/keyman_locales.py

@@ -0,0 +1,41 @@
+#!/usr/bin/python3
+#
+# Keyman is copyright (C) SIL Global. MIT License.
+# 
+# Created by Marc Durdin on 2026-08-18
+# 
+# Find the current display locale ID, using the same method as
+# gettext.find()
+# 
+
+import os
+import re
+
+#
+# @returns array of language identifiers in POSIX style, i.e. 'en_US', not 'en-US'.
+#
+# The returned array always includes the value 'C' for the default static locale,
+# which should be replaced with 'en' when passed to other processes
+#
+def find_locales():
+    # Approach comes from gettext.find()
+    languages = []
+    for envvar in ('LANGUAGE', 'LC_ALL', 'LC_MESSAGES', 'LANG'):
+        val = os.environ.get(envvar)
+        if val:
+            # technically only LANGUAGE should have multiple entries,
+            # but we match gettext's implementation for consistency
+            languages = val.split(':')
+            break
+    if 'C' not in languages:
+        languages.append('C')
+
+    # the env vars may also have .encoding or @modifier suffixes that we don't 
+    # care about
+    # https://www.linux.com/news/controlling-your-locale-environment-variables/
+    locale_ids = []
+    for lang in languages:
+        locale_id = re.split(r"[.@]", lang)
+        locale_ids.append(locale_id[0])
+
+    return locale_ids

linux/keyman-config/tests/keyman_locales_tests.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+#
+# Keyman is copyright (C) SIL Global. MIT License.
+# 
+# Created by Marc Durdin on 2026-08-19
+# 
+# Unit tests for find_locales
+# 
+import os
+from unittest import TestCase, mock
+from keyman_config.keyman_locales import find_locales
+
+class FindLocalesTests(TestCase):
+    @mock.patch.dict(os.environ, {"LANGUAGE": "en_US.UTF-8:de_DE.UTF-8"}, True)
+    def test_find_locales_LANGUAGE(self):
+        loc = find_locales()
+        self.assertEqual(loc, ['en_US', 'de_DE', 'C'])
+
+    @mock.patch.dict(os.environ, {"LANGUAGE": "en_US.UTF-8:de_DE.UTF-8", "LANG": "fr_FR"}, True)
+    def test_find_locales_LANGUAGE_and_LANG(self):
+        loc = find_locales()
+        self.assertEqual(loc, ['en_US', 'de_DE', 'C'])
+
+    @mock.patch.dict(os.environ, {"LANG": "de_DE.UTF-8@euro"}, True)
+    def test_find_locales_LANG(self):
+        loc = find_locales()
+        self.assertEqual(loc, ['de_DE', 'C'])
+
+    @mock.patch.dict(os.environ, {"LC_MESSAGES": "km_Khmr_KH.UTF-8"}, True)
+    def test_find_locales_LC_MESSAGES(self):
+        loc = find_locales()
+        self.assertEqual(loc, ['km_Khmr_KH', 'C'])
+
+    @mock.patch.dict(os.environ, {"LC_ALL": "km_Khmr_KH.UTF-8"}, True)
+    def test_find_locales_LC_ALL(self):
+        loc = find_locales()
+        self.assertEqual(loc, ['km_Khmr_KH', 'C'])