[doc] introduce about.language and sort engines by it

searx/engines/duden.py

@@ -16,6 +16,7 @@ about = {
     "use_official_api": False,
     "require_api_key": False,
     "results": 'HTML',
+    "language": 'de',
 }
 
 categories = ['general']

searx/engines/ina.py

@@ -18,6 +18,7 @@ about = {
     "use_official_api": False,
     "require_api_key": False,
     "results": 'HTML',
+    "language": 'fr',
 }
 
 # engine dependent config

searx/engines/mediathekviewweb.py

@@ -14,6 +14,7 @@ about = {
     "use_official_api": True,
     "require_api_key": False,
     "results": 'JSON',
+    "language": "de",
 }
 
 categories = ['videos']

searx/engines/seznam.py

@@ -22,6 +22,7 @@ about = {
     "use_official_api": False,
     "require_api_key": False,
     "results": "HTML",
+    "language": "cz",
 }
 
 base_url = 'https://search.seznam.cz/'

searx/engines/sjp.py

@@ -18,6 +18,7 @@ about = {
     "use_official_api": False,
     "require_api_key": False,
     "results": 'HTML',
+    "language": 'pl',
 }
 
 categories = ['general']

searx/settings.yml

@@ -352,6 +352,9 @@ engines:
       use_official_api: false
       require_api_key: false
       results: HTML
+      # We don't set language: de here because media.ccc.de is not just
+      # for a German audience. It contains many English videos and many
+      # German videos have English subtitles.
 
   - name: ccengine
     engine: ccengine
@@ -1573,6 +1576,7 @@ engines:
       use_official_api: false
       require_api_key: false
       results: HTML
+      language: ko
 
   - name: rubygems
     shortcut: rbg
@@ -1649,6 +1653,7 @@ engines:
       use_official_api: false
       require_api_key: false
       results: HTML
+      language: de
 
   - name: słownik języka polskiego
     engine: sjp
@@ -1676,6 +1681,7 @@ engines:
       use_official_api: false
       require_api_key: false
       results: HTML
+      language: fr
 
   - name: brave
     shortcut: brave