[translation] Added Polish translation from POEditor

package/innosetup/pl-pl.isl

@@ -0,0 +1,11 @@
+[CustomMessages]
+add_firewall_rule_traintastic_client=Dodaj regułę zapory dla klienta Traintastic
+add_firewall_rule_wlanmaus_z21=Dodaj regułę zapory dla WLANmaus/Z21
+client_and_server=Klient i serwer
+client_and_server_desc=Dla komputera podłączonego do centrali sterującej.
+client_only=Tylko klient
+client_only_desc=Dla dodatkowych komputerów do obsługi makiety kolejowej.
+firewall_allow_traintastic_client=Zezwól klientowi Traintastic
+firewall_allow_wlanmaus_z21=Zezwól WLANmaus/Z21
+windows_firewall=Zapora Windows:
+

package/innosetup/traintastic.iss

@@ -45,6 +45,7 @@ Name: de; MessagesFile: "compiler:Languages\German.isl,de-de.isl"
 Name: it; MessagesFile: "compiler:Languages\Italian.isl,it-it.isl"
 Name: sv; MessagesFile: "Languages\Swedish.isl,sv-se.isl"
 Name: fr; MessagesFile: "compiler:Languages\French.isl,fr-fr.isl"
+Name: pl; MessagesFile: "compiler:Languages\Polish.isl,pl-pl.isl"
 
 [Tasks]
 Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked
@@ -217,6 +218,7 @@ begin
     'it': Result := 'it-it';
     'sv': Result := 'sv-se';
     'fr': Result := 'fr-fr';
+    'pl': Result := 'pl-pl';
   else
     Result := 'en-us';
   end;

shared/translations/en-us.json

@@ -847,6 +847,10 @@
         "term": "language:nl-nl",
         "definition": "Dutch"
     },
+    {
+        "term": "language:pl-pl",
+        "definition": "Polish"
+    },
     {
         "term": "language:sv-se",
         "definition": "Swedish"

utils/translations.py

@@ -6,7 +6,17 @@ from operator import itemgetter
 
 PROJECT_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
 POEDITOR_PROJECT_ID = 622757
-LANGUAGES = ['en-us', 'de-de', 'es-es', 'fr-fr', 'fy-nl', 'it-it', 'nl-nl', 'sv-se']
+LANGUAGES = [
+    'en-us',
+    'de-de',
+    'es-es',
+    'fr-fr',
+    'fy-nl',
+    'it-it',
+    'nl-nl',
+    'pl-pl',
+    'sv-se',
+]
 
 
 def poeditor_language_code(code: str) -> str: