diff --git a/src/i18n/strings/pl.json b/src/i18n/strings/pl.json
index eec83f8b65..9138087cd9 100644
--- a/src/i18n/strings/pl.json
+++ b/src/i18n/strings/pl.json
@@ -25,5 +25,9 @@
     "You can continue using your current browser, but some or all features may not work and the look and feel of the application may be incorrect.": "Możesz kontynuować używanie obecnej przeglądarki, lecz niektóre lub wszystkie funkcje mogą nie działać oraz wygląd aplikacji może być niepoprawny.",
     "I understand the risks and wish to continue": "Rozumiem ryzyko i chcę kontynuować",
     "Go to element.io": "Przejdź do element.io",
-    "Failed to start": "Nie udało się wystartować"
+    "Failed to start": "Nie udało się wystartować",
+    "Download Completed": "Pobieranie Zakończone",
+    "Open": "Otwórz",
+    "Your browser can't run %(brand)s": "Twoja przeglądarka nie obsługuje %(brand)s",
+    "%(brand)s uses advanced browser features which aren't supported by your current browser.": "%(brand)s używa zaawansowanych funkcji przeglądarki, które nie są dostępne w twojej przeglądarce."
 }
diff --git a/src/i18n/strings/pt.json b/src/i18n/strings/pt.json
index c29ed4a2af..1092b667c3 100644
--- a/src/i18n/strings/pt.json
+++ b/src/i18n/strings/pt.json
@@ -3,7 +3,7 @@
     "powered by Matrix": "powered by Matrix",
     "Unknown device": "Dispositivo desconhecido",
     "You need to be using HTTPS to place a screen-sharing call.": "Necessita de estar a usar HTTPS para poder iniciar uma chamada com partilha de ecrã.",
-    "Welcome to Element": "Bem-vindo ao Element",
+    "Welcome to Element": "Boas-vindas ao Element",
     "Decentralised, encrypted chat & collaboration powered by [matrix]": "Chat descentralizado, encriptado & colaborativo powered by [matrix]",
     "The message from the parser is: %(message)s": "A mensagem do parser é: %(message)s",
     "Invalid JSON": "JSON inválido",
diff --git a/src/i18n/strings/pt_BR.json b/src/i18n/strings/pt_BR.json
index 9ad9220a7c..8f83d05c7c 100644
--- a/src/i18n/strings/pt_BR.json
+++ b/src/i18n/strings/pt_BR.json
@@ -3,7 +3,7 @@
     "powered by Matrix": "oferecido por Matrix",
     "Unknown device": "Aparelho desconhecido",
     "You need to be using HTTPS to place a screen-sharing call.": "Você precisa usar HTTPS para compartilhar a tela durante uma chamada.",
-    "Welcome to Element": "Seja bem-vinda(o) a Element",
+    "Welcome to Element": "Boas-vindas ao Element",
     "Decentralised, encrypted chat & collaboration powered by [matrix]": "Chat descentralizado, criptografado e colaborativo construído com [matrix]",
     "Sign In": "Entrar",
     "Create Account": "Criar Conta",