diff --git a/src/lib/support/__tests__/support-report-redaction.test.ts b/src/lib/support/__tests__/support-report-redaction.test.ts
index f42c18c92..bf9613186 100644
--- a/src/lib/support/__tests__/support-report-redaction.test.ts
+++ b/src/lib/support/__tests__/support-report-redaction.test.ts
@@ -21,11 +21,13 @@ import {
   type SupportReportFacts,
 } from "../report";
 import {
+  HOST_TLDS,
   redactSupportText,
   SUPPORT_REDACTION_STEPS,
   type SupportRedactionContext,
 } from "../redact";
 import type { WideEvent } from "@/lib/logging/types";
+import { locales, type Locale } from "@/lib/i18n/config";
 
 const ACCOUNT_EMAIL = "anna.schmidt@example.org";
 const ACCOUNT_ID = "cmq7x0abcdefghijklmnopqrs";
@@ -366,3 +368,64 @@ describe("error classes never carry the message", () => {
     expect(JSON.stringify(top)).not.toContain(SEEDS.ids);
   });
 });
+
+describe("host names under every app language's country codes", () => {
+  // Where each shipped language is at home. A new locale fails here until its
+  // countries are listed, and a listed country fails until HOST_TLDS has it.
+  const HOST_TLD_LOCALE_REGIONS: Record<Locale, readonly string[]> = {
+    de: ["de", "at", "ch", "li", "lu", "be"],
+    en: ["uk", "ie", "us", "ca", "au", "nz"],
+    fr: ["fr", "be", "ch", "lu", "ca"],
+    es: ["es", "mx", "ar"],
+    it: ["it", "ch"],
+    pl: ["pl"],
+    ko: ["kr"],
+    nl: ["nl", "be"],
+    "pt-BR": ["br", "pt", "ao", "mz"],
+  };
+
+  it("covers every shipped locale", () => {
+    expect(Object.keys(HOST_TLD_LOCALE_REGIONS).sort()).toEqual(
+      [...locales].sort(),
+    );
+  });
+
+  it.each(Object.entries(HOST_TLD_LOCALE_REGIONS))(
+    "redacts a host under each of %s's country codes",
+    (_locale, tlds) => {
+      for (const tld of tlds) {
+        expect(HOST_TLDS, tld).toContain(tld);
+        const text = redactSupportText(`reached nas.familie.${tld} late`, {
+          knownValues: [],
+        });
+        expect(text, tld).toBe("reached [host] late");
+      }
+    },
+  );
+
+  it("redacts Brazilian and Portuguese hosts, with a port or a second-level registry", () => {
+    const cases = [
+      "saude.minhacasa.br:3000",
+      "vida.example.com.br",
+      "healthlog.casa.pt",
+      "nas.lan.com.pt:8443",
+    ];
+    for (const host of cases) {
+      const text = redactSupportText(`unexpected_silence ${host}`, {
+        knownValues: [],
+      });
+      expect(text, host).not.toMatch(/minhacasa|example|casa|lan\.com/);
+      expect(text).toContain("[host]");
+    }
+  });
+
+  it("still leaves report prose and action names alone", () => {
+    const text = redactSupportText(
+      "- Actions: mental-health.create, coach.budget.exceeded, measurement.batch.ingest\n- Node: v22.11.0",
+      { knownValues: [] },
+    );
+    expect(text).toContain("mental-health.create");
+    expect(text).toContain("coach.budget.exceeded");
+    expect(text).toContain("measurement.batch.ingest");
+  });
+});
diff --git a/src/lib/support/redact.ts b/src/lib/support/redact.ts
index 7ab5359ed..0ba0ccf3b 100644
--- a/src/lib/support/redact.ts
+++ b/src/lib/support/redact.ts
@@ -39,8 +39,16 @@ function escapeRegExp(value: string): string {
  */
 const KNOWN_VALUE_MIN_LENGTH = 5;
 
-/** Top-level domains a host name in a self-hosted setup ends in. */
-const HOST_TLDS = [
+/**
+ * Top-level domains a host name in a self-hosted setup ends in: the generic
+ * ones, the home-network suffixes, and the country codes of every place the
+ * app's languages are at home (`HOST_TLD_LOCALE_REGIONS` in the test pins
+ * that list against `locales`), plus the neighbours a self-hoster there is
+ * as likely to register under. A second-level registry (`com.br`, `co.uk`)
+ * needs nothing extra: the label before it is matched as a subdomain.
+ */
+export const HOST_TLDS = [
+  // Generic.
   "com",
   "net",
   "org",
@@ -50,18 +58,44 @@ const HOST_TLDS = [
   "cloud",
   "info",
   "me",
+  "co",
+  "xyz",
+  "online",
+  "site",
+  "eu",
+  // Country codes.
   "de",
   "at",
   "ch",
-  "eu",
-  "uk",
+  "li",
+  "lu",
+  "be",
+  "nl",
   "fr",
   "es",
+  "pt",
+  "br",
+  "ao",
+  "mz",
   "it",
   "pl",
-  "nl",
+  "cz",
+  "sk",
   "kr",
+  "jp",
+  "uk",
+  "ie",
   "us",
+  "ca",
+  "au",
+  "nz",
+  "mx",
+  "ar",
+  "se",
+  "dk",
+  "no",
+  "fi",
+  // Home-network and private suffixes.
   "local",
   "lan",
   "home",
@@ -69,7 +103,9 @@ const HOST_TLDS = [
   "arpa",
   "localdomain",
   "ts",
-].join("|");
+];
+
+const HOST_TLD_PATTERN = HOST_TLDS.join("|");
 
 export const SUPPORT_REDACTION_STEPS: readonly SupportRedactionStep[] = [
   {
@@ -132,7 +168,7 @@ export const SUPPORT_REDACTION_STEPS: readonly SupportRedactionStep[] = [
     apply: (text) =>
       text.replace(
         new RegExp(
-          `\\b(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\\.)+(?:${HOST_TLDS})\\b`,
+          `\\b(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\\.)+(?:${HOST_TLD_PATTERN})\\b`,
           "gi",
         ),
         "[host]",