diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e8ce6c..ab14b32 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,40 @@
+## v0.251.0 — Nothing decides by reading a Hungarian word (2026-09-17, R-553 + R-563)
+
+**MinAgent: 0.131.0** (unchanged). **No hub release needed.** Nothing a household reads changes: every
+Hungarian sentence is byte-identical, and the hub report is unchanged (pinned by a wire test).
+
+Five places branched on their own customer-facing copy. Localisation slice 2 translates exactly those
+words, and each one would then have taken the other branch, silently. Each now reads a signal set where
+the message is made — `internal/util.KindErrorf` builds the same bytes `fmt.Errorf` did while carrying a
+sentinel for `errors.Is`.
+
+| # | decision | read before | reads now |
+|---|---|---|---|
+| 1 | deploy HTTP status (`api.deployStatusFor`) | „kötelező", „memória", "does not exist", "already deployed" | `stacks.ErrRequiredField` / `ErrPathMissing` / `ErrNotEnoughMemory` (400), `ErrAlreadyDeployed` (409) |
+| 2 | off-site failure class (`ClassifyOffsiteFailure`) | „tárhelykeretet" | `backup.ErrOffsiteQuota` |
+| 3 | where a disk warning is shown (`web/alerts.go`) | „meghajtó"/„adattároló" in the warning | `monitor.WarnKindStorageNotSeparate`, carried in `HealthReport.WarningKinds` |
+| 4 | the stale „nothing selected" note (`offboxWarningDisplay`) | „nincs mentésre jelölt alkalmazás" in the PERSISTED text | `settings.OffboxTarget.LastWarningKind` = `backup.OffboxWarnNoAppsSelected` |
+| 5 | the remote-backup poll (`backups_remote.html`) | the displayed word „Fut" | `data-status="running"` on the status element (R-563) |
+
+- **The restic / ssh signatures in the classifier stay text matches on purpose** — that output is not
+  ours and is never translated. Listed as external in REPORT.md.
+- **Site 4 legacy:** a box upgraded to 0.251.0 still carries the old persisted text with no kind until
+  its next off-site run. The text test survives ONLY for `kind == ""`, with a removal row (R-570);
+  **slice 2 must not translate that producer before R-570 closes.**
+- **Site 5 is the one rendered byte that changed:** the `data-status` attribute (plus the poll line).
+  12 `backups_remote` fixtures re-captured; each differs from its predecessor by exactly those two
+  things, the other 94 are byte-identical. „Fut…" is now `{{T "backups_remote.fut"}}` (en „Running…"),
+  so the English page finally sees a running backup.
+- **The wire is untouched:** `internal/report/builder.go` copies Status/Issues/Warnings only;
+  `TestR553_HubReportWarningsAreUnchangedOnTheWire` pins the field set and the bytes.
+- New in REUSE.md §1: „Error kinds — never branch on a customer-facing sentence".
+
+**Red-proofs** (`felhom.eu/documentation/audits/r553-2026-09-17/redproofs.txt`): every site's pre-fix
+predicate restored and watched failing — deploy statuses fall to 500/400-for-anything, the translated
+quota error reads „ismeretlen okból", the translated disk warning jumps to the top banner, the stale
+note returns, and both languages lose the poll. The detector (`felhom.eu/scripts/i18n_inventory.py`)
+was re-run: template compares 1 → 0, and planted decoys prove it still convicts.
+
 ## v0.250.0 — Every dashboard page in English; the language switch shown to every household (2026-09-17, R-556 release C)
 
 **MinAgent: 0.131.0** (unchanged). **No hub release needed.** **A Hungarian household sees one new thing:
diff --git a/CONTEXT.md b/CONTEXT.md
index 4f5a6eb..db43b73 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -9,6 +9,8 @@
 
 Last updated: 2026-09-17 (v0.247.0 — i18n spike: the dashboard can speak English, Hungarian byte-identical)
 
+> **2026-09-17 night — v0.251.0 (R-553 + R-563 CLOSED).** Five decisions that read their own Hungarian words now read a kind: deploy status sentinels (`internal/stacks/deploy_errors.go`), `backup.ErrOffsiteQuota`, `monitor.WarningKinds`, `settings.LastWarningKind` (legacy text fallback until R-570), and `data-status` on the remote-backup status. `util.KindErrorf` keeps message bytes identical. Slice 2 (R-557) is unblocked except the one producer named in R-570.
+
 > **2026-09-17 night — v0.250.0 (R-556 release C, slice 1 CLOSED).** All templates converted; the language switch is on every dashboard page (decision 6 superseded); login/claim/guest/catch-all through `executeTemplateLang`; Go-side messages and three app-name titles stay Hungarian (slice 2).
 
 > **2026-09-17 evening — v0.248.0 + v0.249.0 (R-556 releases A, B).** Apps/settings and backup pages